fix test_chunking

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/runner.py b/tests/runner.py
index db33c817..f0b5445c 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -10075,7 +10075,7 @@ f.close()
             (1, 0, 3, 2), (1, 1, 3, 4)
           ]:
           print asm, linkable, chunks, js_chunks
-          output, err = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_libcxx.cpp'), '-O1', '-s', 'LINKABLE=%d' % linkable, '-s', 'ASM_JS=%d' % asm, '-s', 'UNRESOLVED_AS_DEAD=1'], stdout=PIPE, stderr=PIPE).communicate()
+          output, err = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_libcxx.cpp'), '-O1', '-s', 'LINKABLE=%d' % linkable, '-s', 'ASM_JS=%d' % asm, '-s', 'UNRESOLVED_AS_DEAD=1'] + (['-O2'] if asm else []), stdout=PIPE, stderr=PIPE).communicate()
           ok = False
           for c in range(chunks, chunks+2):
             ok = ok or ('phase 2 working on %d chunks' % c in err)