janitorial: add SPDX-License-Identifier: LGPL-2.1-or-later

Just a nice thing to have in headers to make it clearer for people who
casually find themselves reading, and perhaps copying, the code.

42 files changed, 109 insertions, 25 deletions

diff --git a/tests/libpeas/engine.c b/tests/libpeas/engine.c
index d8fa47c..5a81d87 100644
--- a/tests/libpeas/engine.c
+++ b/tests/libpeas/engine.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/extension-c.c b/tests/libpeas/extension-c.c
index 0dca6f8..cdd7f76 100644
--- a/tests/libpeas/extension-c.c
+++ b/tests/libpeas/extension-c.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/extension-lua.c b/tests/libpeas/extension-lua.c
index 79f42a6..0a0b541 100644
--- a/tests/libpeas/extension-lua.c
+++ b/tests/libpeas/extension-lua.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/extension-py.c b/tests/libpeas/extension-py.c
index 8ec155d..f71c14a 100644
--- a/tests/libpeas/extension-py.c
+++ b/tests/libpeas/extension-py.c
@@ -18,6 +18,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/extension-set.c b/tests/libpeas/extension-set.c
index c4a2af5..ba8942f 100644
--- a/tests/libpeas/extension-set.c
+++ b/tests/libpeas/extension-set.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/introspection/introspection-abstract.c b/tests/libpeas/introspection/introspection-abstract.c
index 0363d0a..a3754f8 100644
--- a/tests/libpeas/introspection/introspection-abstract.c
+++ b/tests/libpeas/introspection/introspection-abstract.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/introspection/introspection-abstract.h b/tests/libpeas/introspection/introspection-abstract.h
index 35025ec..1082d71 100644
--- a/tests/libpeas/introspection/introspection-abstract.h
+++ b/tests/libpeas/introspection/introspection-abstract.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __INTROSPECTION_ABSTRACT_H__
diff --git a/tests/libpeas/introspection/introspection-base.c b/tests/libpeas/introspection/introspection-base.c
index 8169d06..f49a6b3 100644
--- a/tests/libpeas/introspection/introspection-base.c
+++ b/tests/libpeas/introspection/introspection-base.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/introspection/introspection-base.h b/tests/libpeas/introspection/introspection-base.h
index e3f7832..813fec6 100644
--- a/tests/libpeas/introspection/introspection-base.h
+++ b/tests/libpeas/introspection/introspection-base.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __INTROSPECTION_BASE_H__
diff --git a/tests/libpeas/introspection/introspection-callable.c b/tests/libpeas/introspection/introspection-callable.c
index 53e6ccc..855a95e 100644
--- a/tests/libpeas/introspection/introspection-callable.c
+++ b/tests/libpeas/introspection/introspection-callable.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/introspection/introspection-callable.h b/tests/libpeas/introspection/introspection-callable.h
index 4f8f525..48dab7b 100644
--- a/tests/libpeas/introspection/introspection-callable.h
+++ b/tests/libpeas/introspection/introspection-callable.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __INTROSPECTION_CALLABLE_H__
diff --git a/tests/libpeas/introspection/introspection-has-prerequisite.c b/tests/libpeas/introspection/introspection-has-prerequisite.c
index f836f52..fb53160 100644
--- a/tests/libpeas/introspection/introspection-has-prerequisite.c
+++ b/tests/libpeas/introspection/introspection-has-prerequisite.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/introspection/introspection-has-prerequisite.h b/tests/libpeas/introspection/introspection-has-prerequisite.h
index 29d25e4..a9c8c54 100644
--- a/tests/libpeas/introspection/introspection-has-prerequisite.h
+++ b/tests/libpeas/introspection/introspection-has-prerequisite.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __INTROSPECTION_HAS_PREREQUISITE_H__
diff --git a/tests/libpeas/introspection/introspection-prerequisite.c b/tests/libpeas/introspection/introspection-prerequisite.c
index 1fed47e..8520d30 100644
--- a/tests/libpeas/introspection/introspection-prerequisite.c
+++ b/tests/libpeas/introspection/introspection-prerequisite.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/introspection/introspection-prerequisite.h b/tests/libpeas/introspection/introspection-prerequisite.h
index 52bab44..c0cf669 100644
--- a/tests/libpeas/introspection/introspection-prerequisite.h
+++ b/tests/libpeas/introspection/introspection-prerequisite.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __INTROSPECTION_PREREQUISITE_H__
diff --git a/tests/libpeas/introspection/introspection-unimplemented.c b/tests/libpeas/introspection/introspection-unimplemented.c
index f6164bd..eafb007 100644
--- a/tests/libpeas/introspection/introspection-unimplemented.c
+++ b/tests/libpeas/introspection/introspection-unimplemented.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/introspection/introspection-unimplemented.h b/tests/libpeas/introspection/introspection-unimplemented.h
index f4c6dc8..65a157a 100644
--- a/tests/libpeas/introspection/introspection-unimplemented.h
+++ b/tests/libpeas/introspection/introspection-unimplemented.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __INTROSPECTION_UNIMPLEMENTED_H__
diff --git a/tests/libpeas/plugin-info.c b/tests/libpeas/plugin-info.c
index eb19012..369ec79 100644
--- a/tests/libpeas/plugin-info.c
+++ b/tests/libpeas/plugin-info.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/plugins/embedded/embedded-plugin.c b/tests/libpeas/plugins/embedded/embedded-plugin.c
index e5bc074..4fc876f 100644
--- a/tests/libpeas/plugins/embedded/embedded-plugin.c
+++ b/tests/libpeas/plugins/embedded/embedded-plugin.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/plugins/embedded/embedded-plugin.h b/tests/libpeas/plugins/embedded/embedded-plugin.h
index 78142d0..cb02f47 100644
--- a/tests/libpeas/plugins/embedded/embedded-plugin.h
+++ b/tests/libpeas/plugins/embedded/embedded-plugin.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __TESTING_EMBEDDED_PLUGIN_H__
diff --git a/tests/libpeas/plugins/extension-c/extension-c-abstract.c b/tests/libpeas/plugins/extension-c/extension-c-abstract.c
index 7c0a008..1a64dc8 100644
--- a/tests/libpeas/plugins/extension-c/extension-c-abstract.c
+++ b/tests/libpeas/plugins/extension-c/extension-c-abstract.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/plugins/extension-c/extension-c-abstract.h b/tests/libpeas/plugins/extension-c/extension-c-abstract.h
index 57d35c3..71704bc 100644
--- a/tests/libpeas/plugins/extension-c/extension-c-abstract.h
+++ b/tests/libpeas/plugins/extension-c/extension-c-abstract.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __EXTENSION_C_ABSTRACT_H__
diff --git a/tests/libpeas/plugins/extension-c/extension-c-missing-symbol-plugin.c b/tests/libpeas/plugins/extension-c/extension-c-missing-symbol-plugin.c
index ea63b57..7404226 100644
--- a/tests/libpeas/plugins/extension-c/extension-c-missing-symbol-plugin.c
+++ b/tests/libpeas/plugins/extension-c/extension-c-missing-symbol-plugin.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #if 0
diff --git a/tests/libpeas/plugins/extension-c/extension-c-plugin.c b/tests/libpeas/plugins/extension-c/extension-c-plugin.c
index 417c8fe..b0225f1 100644
--- a/tests/libpeas/plugins/extension-c/extension-c-plugin.c
+++ b/tests/libpeas/plugins/extension-c/extension-c-plugin.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/plugins/extension-c/extension-c-plugin.h b/tests/libpeas/plugins/extension-c/extension-c-plugin.h
index 5454709..19c3b6b 100644
--- a/tests/libpeas/plugins/extension-c/extension-c-plugin.h
+++ b/tests/libpeas/plugins/extension-c/extension-c-plugin.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __EXTENSION_C_PLUGIN_H__
diff --git a/tests/libpeas/testing/testing-extension.c b/tests/libpeas/testing/testing-extension.c
index 907cdc5..59b736a 100644
--- a/tests/libpeas/testing/testing-extension.c
+++ b/tests/libpeas/testing/testing-extension.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/testing/testing-extension.h b/tests/libpeas/testing/testing-extension.h
index 03f5a84..513f1fe 100644
--- a/tests/libpeas/testing/testing-extension.h
+++ b/tests/libpeas/testing/testing-extension.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __TESTING_EXTENSION_H__
diff --git a/tests/libpeas/testing/testing.c b/tests/libpeas/testing/testing.c
index 011c660..75748fe 100644
--- a/tests/libpeas/testing/testing.c
+++ b/tests/libpeas/testing/testing.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/libpeas/testing/testing.h b/tests/libpeas/testing/testing.h
index cdc9fdd..1b70cca 100644
--- a/tests/libpeas/testing/testing.h
+++ b/tests/libpeas/testing/testing.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __TESTING_H__
diff --git a/tests/plugins/builtin/builtin-plugin.c b/tests/plugins/builtin/builtin-plugin.c
index bc25b86..3e66c86 100644
--- a/tests/plugins/builtin/builtin-plugin.c
+++ b/tests/plugins/builtin/builtin-plugin.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/plugins/builtin/builtin-plugin.h b/tests/plugins/builtin/builtin-plugin.h
index 8bfca23..65a0025 100644
--- a/tests/plugins/builtin/builtin-plugin.h
+++ b/tests/plugins/builtin/builtin-plugin.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __TESTING_BUILTIN_PLUGIN_H__
diff --git a/tests/plugins/has-dep/has-dep-plugin.c b/tests/plugins/has-dep/has-dep-plugin.c
index b06e321..61829a7 100644
--- a/tests/plugins/has-dep/has-dep-plugin.c
+++ b/tests/plugins/has-dep/has-dep-plugin.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/plugins/has-dep/has-dep-plugin.h b/tests/plugins/has-dep/has-dep-plugin.h
index 0d1918f..67e295c 100644
--- a/tests/plugins/has-dep/has-dep-plugin.h
+++ b/tests/plugins/has-dep/has-dep-plugin.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __TESTING_HAS_DEP_PLUGIN_H__
diff --git a/tests/plugins/loadable/loadable-plugin.c b/tests/plugins/loadable/loadable-plugin.c
index bc555ea..0ecc0bb 100644
--- a/tests/plugins/loadable/loadable-plugin.c
+++ b/tests/plugins/loadable/loadable-plugin.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/plugins/loadable/loadable-plugin.h b/tests/plugins/loadable/loadable-plugin.h
index 8470e73..ba7af25 100644
--- a/tests/plugins/loadable/loadable-plugin.h
+++ b/tests/plugins/loadable/loadable-plugin.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __TESTING_LOADABLE_PLUGIN_H__
diff --git a/tests/plugins/self-dep/self-dep-plugin.c b/tests/plugins/self-dep/self-dep-plugin.c
index e921d1d..02f9b6a 100644
--- a/tests/plugins/self-dep/self-dep-plugin.c
+++ b/tests/plugins/self-dep/self-dep-plugin.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifdef HAVE_CONFIG_H
diff --git a/tests/plugins/self-dep/self-dep-plugin.h b/tests/plugins/self-dep/self-dep-plugin.h
index 8b47b22..0d30d3e 100644
--- a/tests/plugins/self-dep/self-dep-plugin.h
+++ b/tests/plugins/self-dep/self-dep-plugin.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __TESTING_SELF_DEP_PLUGIN_H__
diff --git a/tests/testing-util/peas-activatable.c b/tests/testing-util/peas-activatable.c
index 7714d1d..2d1c935 100644
--- a/tests/testing-util/peas-activatable.c
+++ b/tests/testing-util/peas-activatable.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #include "config.h"
diff --git a/tests/testing-util/peas-activatable.h b/tests/testing-util/peas-activatable.h
index 8148de6..03f008c 100644
--- a/tests/testing-util/peas-activatable.h
+++ b/tests/testing-util/peas-activatable.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __PEAS_ACTIVATABLE_H__
diff --git a/tests/testing-util/peas-test-common.h b/tests/testing-util/peas-test-common.h
index 20281ee..e33ff0a 100644
--- a/tests/testing-util/peas-test-common.h
+++ b/tests/testing-util/peas-test-common.h
@@ -1,26 +1,28 @@
-/*

- * peas-test-common.h

- * This file is part of libpeas

- *

- * Copyright (C) 2019 - Chun-wei Fan

- *

- * libpeas is free software; you can redistribute it and/or

- * modify it under the terms of the GNU Lesser General Public

- * License as published by the Free Software Foundation; either

- * version 2.1 of the License, or (at your option) any later version.

- *

- * libpeas 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

- * Lesser General Public License for more details.

- *

- * You should have received a copy of the GNU Lesser General Public

- * License along with this library; if not, write to the Free Software

- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.

- */

-

-#ifdef _MSC_VER

-# define PEAS_TEST_EXPORT __declspec (dllexport)

-#else

-# define PEAS_TEST_EXPORT

+/*
+ * peas-test-common.h
+ * This file is part of libpeas
+ *
+ * Copyright (C) 2019 - Chun-wei Fan
+ *
+ * libpeas is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * libpeas 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+#ifdef _MSC_VER
+# define PEAS_TEST_EXPORT __declspec (dllexport)
+#else
+# define PEAS_TEST_EXPORT
 #endif
\ No newline at end of file
diff --git a/tests/testing-util/testing-util.c b/tests/testing-util/testing-util.c
index 7e751c8..905b407 100644
--- a/tests/testing-util/testing-util.c
+++ b/tests/testing-util/testing-util.c
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #include "config.h"
diff --git a/tests/testing-util/testing-util.h b/tests/testing-util/testing-util.h
index 27caf9d..e76bbb0 100644
--- a/tests/testing-util/testing-util.h
+++ b/tests/testing-util/testing-util.h
@@ -17,6 +17,8 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #ifndef __TESTING_UTIL_H__