diff --git a/fstest/test_all/test_all.go b/fstest/test_all/test_all.go
index 5c90c0a42..72c6548fd 100644
--- a/fstest/test_all/test_all.go
+++ b/fstest/test_all/test_all.go
@@ -419,6 +419,9 @@ func main() {
 		}
 	}
 
+	// workaround for cache backend as we run simultaneous tests
+	_ = os.Setenv("RCLONE_CACHE_DB_WAIT_TIME", "30m")
+
 	// start the tests
 	results := make(chan *test, 8)
 	awaiting := 0