diff --git a/src/backends/meta-monitor-transform.h b/src/backends/meta-monitor-transform.h
index e5757e869..c49e29e81 100644
--- a/src/backends/meta-monitor-transform.h
+++ b/src/backends/meta-monitor-transform.h
@@ -52,6 +52,7 @@ meta_monitor_transform_is_flipped (MetaMonitorTransform transform)
   return (transform >= META_MONITOR_TRANSFORM_FLIPPED);
 }
 
+META_EXPORT_TEST
 MetaMonitorTransform meta_monitor_transform_invert (MetaMonitorTransform transform);
 
 META_EXPORT_TEST
diff --git a/src/tests/monitor-transform-tests.c b/src/tests/monitor-transform-tests.c
index fb505d00c..871a06b10 100644
--- a/src/tests/monitor-transform-tests.c
+++ b/src/tests/monitor-transform-tests.c
@@ -62,22 +62,23 @@ test_transform (void)
     },
     {
       .transform = META_MONITOR_TRANSFORM_NORMAL,
-      .other = META_MONITOR_TRANSFORM_270,
+      .other = meta_monitor_transform_invert (META_MONITOR_TRANSFORM_90),
       .expect = META_MONITOR_TRANSFORM_270,
     },
     {
       .transform = META_MONITOR_TRANSFORM_FLIPPED,
-      .other = META_MONITOR_TRANSFORM_270,
+      .other = meta_monitor_transform_invert (META_MONITOR_TRANSFORM_90),
       .expect = META_MONITOR_TRANSFORM_FLIPPED_270,
     },
     {
       .transform = META_MONITOR_TRANSFORM_FLIPPED_180,
-      .other = META_MONITOR_TRANSFORM_90,
+      .other = meta_monitor_transform_invert (META_MONITOR_TRANSFORM_270),
       .expect = META_MONITOR_TRANSFORM_FLIPPED_270,
     },
     {
       .transform = META_MONITOR_TRANSFORM_FLIPPED_180,
-      .other = META_MONITOR_TRANSFORM_FLIPPED_180,
+      .other =
+        meta_monitor_transform_invert (META_MONITOR_TRANSFORM_FLIPPED_180),
       .expect = META_MONITOR_TRANSFORM_NORMAL,
     },
   };