--- a/media/webrtc/moz.build
+++ b/media/webrtc/moz.build
@@ -116,9 +116,10 @@ if CONFIG['MOZ_WIDGET_TOOLKIT'] != 'gonk
         GYP_DIRS['signalingtest'].variables.update(
             build_for_test=1,
             moz_webrtc_mediacodec=0,
             build_for_standalone=0
         )
         GYP_DIRS['signalingtest'].sandbox_vars['ALLOW_COMPILER_WARNINGS'] = True
         GYP_DIRS['signalingtest'].non_unified_sources += signaling_non_unified_sources
 
-DIRS += ['signaling/fuzztest']
+if CONFIG['ENABLE_TESTS']:
+    DIRS += ['signaling/fuzztest']