diff --git a/tests/test-import-bypass.t b/tests/test-import-bypass.t
--- a/tests/test-import-bypass.t
+++ b/tests/test-import-bypass.t
@@ -227,7 +227,7 @@
 (this also tests that editor is not invoked for '--bypass', if the
 commit message is explicitly specified, regardless of '--edit')
 
-  $ $PYTHON -c 'file("a", "wb").write("a\r\n")'
+  $ $PYTHON -c 'open("a", "wb").write(b"a\r\n")'
   $ hg ci -m makeacrlf
   $ HGEDITOR=cat hg import -m 'should fail because of eol' --edit --bypass ../test.diff
   applying ../test.diff