diff --git a/tests/meson.build b/tests/meson.build
index e2c6b57..5f84d5b 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -14,6 +14,7 @@ foreach t: tests
         ],
         env: [
             'G_DEBUG=fatal-criticals',
+            'G_MESSAGES_DEBUG=all',
             'FPRINT_BUILD_DIR=' + meson.build_root() / 'src',
             'TOPSRCDIR=' + meson.source_root(),
         ],