diff --git a/tests/test-relink.t b/tests/test-relink.t
--- a/tests/test-relink.t
+++ b/tests/test-relink.t
@@ -49,7 +49,7 @@
 
 Test files are read in binary mode
 
-  $ $PYTHON -c "file('.hg/store/data/dummy.i', 'wb').write('a\r\nb\n')"
+  $ $PYTHON -c "open('.hg/store/data/dummy.i', 'wb').write(b'a\r\nb\n')"
   $ cd ..
 
 
@@ -68,7 +68,7 @@
   $ echo b >> b
   $ hg ci -m changeb
   created new head
-  $ $PYTHON -c "file('.hg/store/data/dummy.i', 'wb').write('a\nb\r\n')"
+  $ $PYTHON -c "open('.hg/store/data/dummy.i', 'wb').write(b'a\nb\r\n')"
 
 
 relink