1 files changed, 4 insertions, 1 deletions
diff --git a/check.py b/check.py
index 9dbedc3d2..528bc34cb 100755
--- a/check.py
+++ b/check.py
@@ -361,8 +361,11 @@ for asm in tests:
           cmd += ['--imprecise']
           wasm += '.imprecise'
         if not opts:
-          cmd += ['--no-opts']
           wasm += '.no-opts'
+          if precise:
+            cmd += ['-O0'] # test that -O0 does nothing
+        else:
+          cmd += ['-O']
         if precise and opts:
           # test mem init importing
           open('a.mem', 'wb').write(asm)