diff --git a/contrib/import-checker.py b/contrib/import-checker.py
--- a/contrib/import-checker.py
+++ b/contrib/import-checker.py
@@ -564,7 +564,7 @@ def main(argv):
             print 'Import cycle:', c
             firstmods.add(first)
         any_errors = True
-    return not any_errors
+    return any_errors != 0
 
 if __name__ == '__main__':
     sys.exit(int(main(sys.argv)))
diff --git a/tests/test-module-imports.t b/tests/test-module-imports.t
--- a/tests/test-module-imports.t
+++ b/tests/test-module-imports.t
@@ -101,6 +101,7 @@ Run additional tests for the import chec
   testpackage/subpackage/levelpriority.py higher-level import should come first: testpackage
   testpackage/symbolimport.py direct symbol import from testpackage.unsorted
   testpackage/unsorted.py imports not lexically sorted: os < sys
+  [1]
 
   $ cd "$TESTDIR"/..
 
@@ -129,3 +130,4 @@ these may expose other cycles.
   Import cycle: mercurial.cmdutil -> mercurial.context -> mercurial.subrepo -> mercurial.cmdutil
   Import cycle: hgext.largefiles.basestore -> hgext.largefiles.localstore -> hgext.largefiles.basestore
   Import cycle: mercurial.commands -> mercurial.commandserver -> mercurial.dispatch -> mercurial.commands
+  [1]