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-rw-r--r--tests/run-make/sysroot-crates-are-unstable/test.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/run-make/sysroot-crates-are-unstable/test.py b/tests/run-make/sysroot-crates-are-unstable/test.py
index cab4faa4e64..45cfdd195b4 100644
--- a/tests/run-make/sysroot-crates-are-unstable/test.py
+++ b/tests/run-make/sysroot-crates-are-unstable/test.py
@@ -46,7 +46,7 @@ def check_lib(lib):
                                    '--target', os.environ['TARGET'],
                                    '--extern', '{}={}'.format(lib['name'], lib['path'])],
                                   to_input=('extern crate {};'.format(lib['name'])).encode('utf-8'))
-    if not 'use of unstable library feature' in '{}{}'.format(stdout, stderr):
+    if 'use of unstable library feature' not in '{}{}'.format(stdout, stderr):
         print('crate {} "{}" is not unstable'.format(lib['name'], lib['path']))
         print('{}{}'.format(stdout, stderr))
         print('')