diff --git a/src/testdir/test_assert.vim b/src/testdir/test_assert.vim
index 25630f2..8c54bdd 100644
--- a/src/testdir/test_assert.vim
+++ b/src/testdir/test_assert.vim
@@ -32,7 +32,7 @@
   call assert_notequal([1, 2, 3], s)
 
   call assert_notequal('foo', s)
-  call assert_match("Expected 'foo' differs from 'foo'", v:errors[0])
+  call assert_match("Expected not equal to 'foo'", v:errors[0])
   call remove(v:errors, 0)
 endfunc