diff --git a/backend/cache/cache_test.go b/backend/cache/cache_test.go
index 764a1489a..96b7e36ae 100644
--- a/backend/cache/cache_test.go
+++ b/backend/cache/cache_test.go
@@ -17,7 +17,7 @@ func TestIntegration(t *testing.T) {
 	fstests.Run(t, &fstests.Opt{
 		RemoteName:                      "TestCache:",
 		NilObject:                       (*cache.Object)(nil),
-		UnimplementableFsMethods:        []string{"PublicLink", "OpenWriterAt", "OpenChunkWriter", "DirSetModTime", "MkdirMetadata"},
+		UnimplementableFsMethods:        []string{"PublicLink", "OpenWriterAt", "OpenChunkWriter", "DirSetModTime", "MkdirMetadata", "ListP"},
 		UnimplementableObjectMethods:    []string{"MimeType", "ID", "GetTier", "SetTier", "Metadata", "SetMetadata"},
 		UnimplementableDirectoryMethods: []string{"Metadata", "SetMetadata", "SetModTime"},
 		SkipInvalidUTF8:                 true, // invalid UTF-8 confuses the cache