diff --git a/Makefile b/Makefile
index 205a727af..36b6072e9 100644
--- a/Makefile
+++ b/Makefile
@@ -322,7 +322,7 @@ portforward-tests: load-basic_redis load-basic_nginx $(RUNTIME_BIN)
 INTEGRATION_TARGETS := //test/image:image_test //test/e2e:integration_test
 
 docker-tests: load-basic $(RUNTIME_BIN)
-	@$(call install_runtime,$(RUNTIME),--overlay2=none)
+	@$(call install_runtime,$(RUNTIME),) # Clear flags.
 	@$(call install_runtime,$(RUNTIME)-fdlimit,--fdlimit=2000) # Used by TestRlimitNoFile.
 	@$(call install_runtime,$(RUNTIME)-dcache,--fdlimit=2000 --dcache=100) # Used by TestDentryCacheLimit.
 	@$(call install_runtime,$(RUNTIME)-host-uds,--host-uds=all) # Used by TestHostSocketConnect.