diff --git a/src/test/java/com/googlesource/gerrit/plugins/websession/flatfile/FlatFileWebSessionCacheTest.java b/src/test/java/com/googlesource/gerrit/plugins/websession/flatfile/FlatFileWebSessionCacheTest.java
index 038135a..905d6bf 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/websession/flatfile/FlatFileWebSessionCacheTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/websession/flatfile/FlatFileWebSessionCacheTest.java
@@ -106,8 +106,7 @@
 
   @Test
   public void getIfPresentObjectNonStringTest() throws Exception {
-    Path path = dir.resolve(key);
-    assertThat(flatFileWebSessionCache.getIfPresent(path)).isNull();
+    assertThat(flatFileWebSessionCache.getIfPresent(new Object())).isNull();
   }
 
   @Test