diff --git a/tests/conform/Makefile.am b/tests/conform/Makefile.am
index b6aa552b9..550082251 100644
--- a/tests/conform/Makefile.am
+++ b/tests/conform/Makefile.am
@@ -140,6 +140,7 @@ endif
 AM_CPPFLAGS += \
 	-DCOGL_ENABLE_EXPERIMENTAL_API \
 	-DCOGL_DISABLE_DEPRECATED \
+	-DCOGL_DISABLE_DEPRECATION_WARNINGS \
 	-DTESTS_DATADIR=\""$(top_srcdir)/tests/data"\"
 
 test_conformance_CFLAGS = -g3 -O0 $(COGL_DEP_CFLAGS) $(COGL_EXTRA_CFLAGS)