Move all license headers to SPDX format.

60 files changed, 60 insertions, 720 deletions

diff --git a/host/tests/CMakeLists.txt b/host/tests/CMakeLists.txt
index bfbf57b41..1b8d2acf7 100644
--- a/host/tests/CMakeLists.txt
+++ b/host/tests/CMakeLists.txt
@@ -1,18 +1,7 @@
 #
 # Copyright 2010-2015 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 
 ########################################################################
diff --git a/host/tests/addr_test.cpp b/host/tests/addr_test.cpp
index 92863e44f..2f082ac65 100644
--- a/host/tests/addr_test.cpp
+++ b/host/tests/addr_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/block_id_test.cpp b/host/tests/block_id_test.cpp
index cab8a8cca..ebb903ba2 100644
--- a/host/tests/block_id_test.cpp
+++ b/host/tests/block_id_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <iostream>
diff --git a/host/tests/blockdef_test.cpp b/host/tests/blockdef_test.cpp
index 5ca8a2472..3fbdb7bee 100644
--- a/host/tests/blockdef_test.cpp
+++ b/host/tests/blockdef_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014-2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <iostream>
diff --git a/host/tests/buffer_test.cpp b/host/tests/buffer_test.cpp
index 23b52a9bf..95670c5f9 100644
--- a/host/tests/buffer_test.cpp
+++ b/host/tests/buffer_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/byteswap_test.cpp b/host/tests/byteswap_test.cpp
index ca5e0cb19..b941686ad 100644
--- a/host/tests/byteswap_test.cpp
+++ b/host/tests/byteswap_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/cal_container_test.cpp b/host/tests/cal_container_test.cpp
index f45ca429d..0d042fee7 100644
--- a/host/tests/cal_container_test.cpp
+++ b/host/tests/cal_container_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2016 Ettus Research
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd/cal/power_container.hpp>
diff --git a/host/tests/cast_test.cpp b/host/tests/cast_test.cpp
index 1bd09e1a5..d9c0b5a81 100644
--- a/host/tests/cast_test.cpp
+++ b/host/tests/cast_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <iostream>
diff --git a/host/tests/chdr_test.cpp b/host/tests/chdr_test.cpp
index cdad7f35e..f91fe8ac9 100644
--- a/host/tests/chdr_test.cpp
+++ b/host/tests/chdr_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd/transport/chdr.hpp>
diff --git a/host/tests/convert_test.cpp b/host/tests/convert_test.cpp
index 982007d4e..489db28fb 100644
--- a/host/tests/convert_test.cpp
+++ b/host/tests/convert_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2012 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd/convert.hpp>
diff --git a/host/tests/device3_test.cpp b/host/tests/device3_test.cpp
index a81f4ca0a..27ff006e0 100644
--- a/host/tests/device3_test.cpp
+++ b/host/tests/device3_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <exception>
diff --git a/host/tests/devtest/CMakeLists.txt b/host/tests/devtest/CMakeLists.txt
index 6fa921bbd..25c20b7ca 100644
--- a/host/tests/devtest/CMakeLists.txt
+++ b/host/tests/devtest/CMakeLists.txt
@@ -1,18 +1,7 @@
 #
 # Copyright 2015 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 
 # Formatting
diff --git a/host/tests/devtest/benchmark_rate_test.py b/host/tests/devtest/benchmark_rate_test.py
index 1fc342b7f..0908bee06 100755
--- a/host/tests/devtest/benchmark_rate_test.py
+++ b/host/tests/devtest/benchmark_rate_test.py
@@ -2,18 +2,7 @@
 #
 # Copyright 2015-2016 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """ Test using benchmark_rate. """
 
diff --git a/host/tests/devtest/bitbang_test.py b/host/tests/devtest/bitbang_test.py
index 24295c5cd..c1770707d 100755
--- a/host/tests/devtest/bitbang_test.py
+++ b/host/tests/devtest/bitbang_test.py
@@ -1,18 +1,7 @@
 #
 # Copyright 2015 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """ Test for gpio --bitbang. """
 
diff --git a/host/tests/devtest/devtest_b2xx.py b/host/tests/devtest/devtest_b2xx.py
index 4b81f0afe..fc8b544e5 100755
--- a/host/tests/devtest/devtest_b2xx.py
+++ b/host/tests/devtest/devtest_b2xx.py
@@ -1,18 +1,7 @@
 #
 # Copyright 2015-2016 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """
 Run device tests for the B2xx series.
diff --git a/host/tests/devtest/devtest_e3xx.py b/host/tests/devtest/devtest_e3xx.py
index 1cab44184..821b36bac 100755
--- a/host/tests/devtest/devtest_e3xx.py
+++ b/host/tests/devtest/devtest_e3xx.py
@@ -1,18 +1,7 @@
 #
 # Copyright 2015 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """
 Run device tests for the E3XX series.
diff --git a/host/tests/devtest/devtest_x3x0.py b/host/tests/devtest/devtest_x3x0.py
index fc6e6b8ef..bfc70173b 100755
--- a/host/tests/devtest/devtest_x3x0.py
+++ b/host/tests/devtest/devtest_x3x0.py
@@ -1,18 +1,7 @@
 #
 # Copyright 2015 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """
 Run device tests for the X3x0 series.
diff --git a/host/tests/devtest/gpio_test.py b/host/tests/devtest/gpio_test.py
index 6ea4413f4..5920004fc 100755
--- a/host/tests/devtest/gpio_test.py
+++ b/host/tests/devtest/gpio_test.py
@@ -1,18 +1,7 @@
 #
 # Copyright 2015 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """ Test for gpio. """
 
diff --git a/host/tests/devtest/run_testsuite.py b/host/tests/devtest/run_testsuite.py
index 44f8b9081..5648357d9 100755
--- a/host/tests/devtest/run_testsuite.py
+++ b/host/tests/devtest/run_testsuite.py
@@ -2,18 +2,7 @@
 #
 # Copyright 2015-2016 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """
 Device test runner.
diff --git a/host/tests/devtest/rx_samples_to_file_test.py b/host/tests/devtest/rx_samples_to_file_test.py
index bac6ac256..e11213cd8 100755
--- a/host/tests/devtest/rx_samples_to_file_test.py
+++ b/host/tests/devtest/rx_samples_to_file_test.py
@@ -2,18 +2,7 @@
 #
 # Copyright 2015 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """ Test the rx_samples_to_file example. """
 
diff --git a/host/tests/devtest/test_messages_test.py b/host/tests/devtest/test_messages_test.py
index 496765c75..1c169b871 100644
--- a/host/tests/devtest/test_messages_test.py
+++ b/host/tests/devtest/test_messages_test.py
@@ -2,18 +2,7 @@
 #
 # Copyright 2015 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """ Test the test_messages example. """
 
diff --git a/host/tests/devtest/test_pps_test.py b/host/tests/devtest/test_pps_test.py
index 1e5b36e2c..31cda255f 100755
--- a/host/tests/devtest/test_pps_test.py
+++ b/host/tests/devtest/test_pps_test.py
@@ -2,18 +2,7 @@
 #
 # Copyright 2015 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """ Test for test_pps_input. """
 
diff --git a/host/tests/devtest/tx_bursts_test.py b/host/tests/devtest/tx_bursts_test.py
index 863f35fe1..f0178b33a 100755
--- a/host/tests/devtest/tx_bursts_test.py
+++ b/host/tests/devtest/tx_bursts_test.py
@@ -2,18 +2,7 @@
 #
 # Copyright 2015 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """ Run the test for tx_burst """
 
diff --git a/host/tests/devtest/usrp_probe.py b/host/tests/devtest/usrp_probe.py
index 50d484518..8782b54ab 100644
--- a/host/tests/devtest/usrp_probe.py
+++ b/host/tests/devtest/usrp_probe.py
@@ -2,18 +2,7 @@
 #
 # Copyright 2015-2016 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """ Run uhd_find_devices and parse the output. """
 
diff --git a/host/tests/devtest/usrp_probe_test.py b/host/tests/devtest/usrp_probe_test.py
index a136a2af7..53c3eac0f 100755
--- a/host/tests/devtest/usrp_probe_test.py
+++ b/host/tests/devtest/usrp_probe_test.py
@@ -2,18 +2,7 @@
 #
 # Copyright 2015 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 """ Run the test for tx_burst """
 
diff --git a/host/tests/dict_test.cpp b/host/tests/dict_test.cpp
index 333aadbba..1d8067096 100644
--- a/host/tests/dict_test.cpp
+++ b/host/tests/dict_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/eeprom_c_test.c b/host/tests/eeprom_c_test.c
index 1b29dfd44..a1003f152 100644
--- a/host/tests/eeprom_c_test.c
+++ b/host/tests/eeprom_c_test.c
@@ -1,18 +1,7 @@
 //
 // Copyright 2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd.h>
diff --git a/host/tests/error_c_test.cpp b/host/tests/error_c_test.cpp
index 8eb90f3d4..1dbc92912 100644
--- a/host/tests/error_c_test.cpp
+++ b/host/tests/error_c_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd/error.h>
diff --git a/host/tests/error_test.cpp b/host/tests/error_test.cpp
index 3d784b1f7..0534210dd 100644
--- a/host/tests/error_test.cpp
+++ b/host/tests/error_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/expert_test.cpp b/host/tests/expert_test.cpp
index 016761194..7c1c4f8af 100644
--- a/host/tests/expert_test.cpp
+++ b/host/tests/expert_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/fe_conn_test.cpp b/host/tests/fe_conn_test.cpp
index b8e69816a..5be3808ef 100644
--- a/host/tests/fe_conn_test.cpp
+++ b/host/tests/fe_conn_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2016 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd/usrp/fe_connection.hpp>
diff --git a/host/tests/fp_compare_delta_test.cpp b/host/tests/fp_compare_delta_test.cpp
index d6d8a5209..41cc9ec49 100644
--- a/host/tests/fp_compare_delta_test.cpp
+++ b/host/tests/fp_compare_delta_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd/utils/math.hpp>
diff --git a/host/tests/fp_compare_epsilon_test.cpp b/host/tests/fp_compare_epsilon_test.cpp
index 45687ad26..5e7b6670c 100644
--- a/host/tests/fp_compare_epsilon_test.cpp
+++ b/host/tests/fp_compare_epsilon_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd/utils/math.hpp>
diff --git a/host/tests/gain_group_test.cpp b/host/tests/gain_group_test.cpp
index 07eaf146e..bba5f121b 100644
--- a/host/tests/gain_group_test.cpp
+++ b/host/tests/gain_group_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/graph.hpp b/host/tests/graph.hpp
index 894c436b3..474792c9c 100644
--- a/host/tests/graph.hpp
+++ b/host/tests/graph.hpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #ifndef INCLUDED_TEST_GRAPH_HPP
diff --git a/host/tests/graph_search_test.cpp b/host/tests/graph_search_test.cpp
index d39f767e9..b79f60ef2 100644
--- a/host/tests/graph_search_test.cpp
+++ b/host/tests/graph_search_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014-2016 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "graph.hpp"
diff --git a/host/tests/log_test.cpp b/host/tests/log_test.cpp
index b0b17ea84..97fffadcb 100644
--- a/host/tests/log_test.cpp
+++ b/host/tests/log_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/math_test.cpp b/host/tests/math_test.cpp
index 8a92e074f..3d7d94ac0 100644
--- a/host/tests/math_test.cpp
+++ b/host/tests/math_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/module_test.cpp b/host/tests/module_test.cpp
index af2f749a7..220cfc569 100644
--- a/host/tests/module_test.cpp
+++ b/host/tests/module_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd/utils/static.hpp>
diff --git a/host/tests/nocscript_common.hpp b/host/tests/nocscript_common.hpp
index 7467e05fb..fb03263c7 100644
--- a/host/tests/nocscript_common.hpp
+++ b/host/tests/nocscript_common.hpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "../lib/rfnoc/nocscript/expression.hpp"
diff --git a/host/tests/nocscript_expr_test.cpp b/host/tests/nocscript_expr_test.cpp
index 31bbc8725..8f5efa6b4 100644
--- a/host/tests/nocscript_expr_test.cpp
+++ b/host/tests/nocscript_expr_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "../lib/rfnoc/nocscript/function_table.hpp"
diff --git a/host/tests/nocscript_ftable_test.cpp b/host/tests/nocscript_ftable_test.cpp
index 546da0c2c..7a578f371 100644
--- a/host/tests/nocscript_ftable_test.cpp
+++ b/host/tests/nocscript_ftable_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "../lib/rfnoc/nocscript/function_table.hpp"
diff --git a/host/tests/nocscript_parser_test.cpp b/host/tests/nocscript_parser_test.cpp
index c21f40ad6..43976d55b 100644
--- a/host/tests/nocscript_parser_test.cpp
+++ b/host/tests/nocscript_parser_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "../lib/rfnoc/nocscript/function_table.hpp"
diff --git a/host/tests/node_connect_test.cpp b/host/tests/node_connect_test.cpp
index ff01828e3..ce6e14af5 100644
--- a/host/tests/node_connect_test.cpp
+++ b/host/tests/node_connect_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "graph.hpp"
diff --git a/host/tests/property_test.cpp b/host/tests/property_test.cpp
index 61d1de9a6..288e6e28f 100644
--- a/host/tests/property_test.cpp
+++ b/host/tests/property_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/ranges_c_test.c b/host/tests/ranges_c_test.c
index 2398588a6..defaf28c3 100644
--- a/host/tests/ranges_c_test.c
+++ b/host/tests/ranges_c_test.c
@@ -1,18 +1,7 @@
 //
 // Copyright 2015-2016 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd.h>
diff --git a/host/tests/ranges_test.cpp b/host/tests/ranges_test.cpp
index 49607b9a3..7c4dc3bdc 100644
--- a/host/tests/ranges_test.cpp
+++ b/host/tests/ranges_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/rate_node_test.cpp b/host/tests/rate_node_test.cpp
index 2e17c02a5..52d9d035f 100644
--- a/host/tests/rate_node_test.cpp
+++ b/host/tests/rate_node_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "graph.hpp"
diff --git a/host/tests/sensors_c_test.c b/host/tests/sensors_c_test.c
index 9a2da3315..985add9e7 100644
--- a/host/tests/sensors_c_test.c
+++ b/host/tests/sensors_c_test.c
@@ -1,18 +1,7 @@
 //
 // Copyright 2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd.h>
diff --git a/host/tests/sid_t_test.cpp b/host/tests/sid_t_test.cpp
index e07e1c9bc..3fdabd2bb 100644
--- a/host/tests/sid_t_test.cpp
+++ b/host/tests/sid_t_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <iostream>
diff --git a/host/tests/sph_recv_test.cpp b/host/tests/sph_recv_test.cpp
index e10926834..4f1b0544e 100644
--- a/host/tests/sph_recv_test.cpp
+++ b/host/tests/sph_recv_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2012,2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/sph_send_test.cpp b/host/tests/sph_send_test.cpp
index 39c7429db..bb011724d 100644
--- a/host/tests/sph_send_test.cpp
+++ b/host/tests/sph_send_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2012,2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/stream_sig_test.cpp b/host/tests/stream_sig_test.cpp
index 904a14053..99e2323bd 100644
--- a/host/tests/stream_sig_test.cpp
+++ b/host/tests/stream_sig_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014-2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <iostream>
diff --git a/host/tests/string_vector_c_test.c b/host/tests/string_vector_c_test.c
index f7f2f7b69..265cf8898 100644
--- a/host/tests/string_vector_c_test.c
+++ b/host/tests/string_vector_c_test.c
@@ -1,18 +1,7 @@
 //
 // Copyright 2015-2016 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd.h>
diff --git a/host/tests/subdev_spec_c_test.c b/host/tests/subdev_spec_c_test.c
index f69b825a8..b71421763 100644
--- a/host/tests/subdev_spec_c_test.c
+++ b/host/tests/subdev_spec_c_test.c
@@ -1,18 +1,7 @@
 //
 // Copyright 2015-2016 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd.h>
diff --git a/host/tests/subdev_spec_test.cpp b/host/tests/subdev_spec_test.cpp
index 81f86380b..00e071bcb 100644
--- a/host/tests/subdev_spec_test.cpp
+++ b/host/tests/subdev_spec_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/tasks_test.cpp b/host/tests/tasks_test.cpp
index 225582591..ca438a65e 100644
--- a/host/tests/tasks_test.cpp
+++ b/host/tests/tasks_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/tick_node_test.cpp b/host/tests/tick_node_test.cpp
index 6b150953b..40d93e480 100644
--- a/host/tests/tick_node_test.cpp
+++ b/host/tests/tick_node_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "graph.hpp"
diff --git a/host/tests/time_spec_test.cpp b/host/tests/time_spec_test.cpp
index 9ff89ab0e..9a8c16603 100644
--- a/host/tests/time_spec_test.cpp
+++ b/host/tests/time_spec_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2012 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>
diff --git a/host/tests/vrt_test.cpp b/host/tests/vrt_test.cpp
index f9dc5aafa..d46589765 100644
--- a/host/tests/vrt_test.cpp
+++ b/host/tests/vrt_test.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2013 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <boost/test/unit_test.hpp>