diff --git a/js/src/tests/lib/tests.py b/js/src/tests/lib/tests.py
index d515c87d6a13..0f9eb18cae7b 100644
--- a/js/src/tests/lib/tests.py
+++ b/js/src/tests/lib/tests.py
@@ -34,7 +34,7 @@
     ],
     # Interpreter-only, for tools that cannot handle binary code generation.
     'interp': [
-        ['--no-baseline', '--no-asmjs']
+        ['--no-baseline', '--no-asmjs', '--no-native-regexp']
     ],
     'none': [
         [] # no flags, normal baseline and ion