diff --git a/test/Makefile b/test/Makefile
index 3a92f14..66c8f8a 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -135,8 +135,15 @@
 clean-deps:
 	@rm -f $(PYTHON_DEPENDS)
 
+ifneq ($(EXTERN_PLUGIN_SRC_DIR),)
+PLUGIN_SRC_DIR=$(EXTERN_PLUGIN_SRC_DIR)
+else
+PLUGIN_SRC_DIR=$(WS_ROOT)/src/plugins
+endif
+PLUGIN_TEST_DIRS=$(shell find $(PLUGIN_SRC_DIR) -type d -name test -exec echo -n " -d {}" \;)
+
 define retest-func
-@env FORCE_FOREGROUND=$(FORCE_FOREGROUND) FAILED_DIR=$(FAILED_DIR) VENV_PATH=$(VENV_PATH) scripts/setsid_wrapper.sh $(FORCE_FOREGROUND) $(VENV_PATH)/bin/activate $(PYTHON_INTERP) $(PYTHON_PROFILE_OPTS) run_tests.py -d $(TEST_DIR) $(UNITTEST_EXTRA_OPTS) || env FAILED_DIR=$(FAILED_DIR) COMPRESS_FAILED_TEST_LOGS=$(COMPRESS_FAILED_TEST_LOGS) scripts/compress_failed.sh
+@env FORCE_FOREGROUND=$(FORCE_FOREGROUND) FAILED_DIR=$(FAILED_DIR) VENV_PATH=$(VENV_PATH) scripts/setsid_wrapper.sh $(FORCE_FOREGROUND) $(VENV_PATH)/bin/activate $(PYTHON_INTERP) $(PYTHON_PROFILE_OPTS) run_tests.py -d $(TEST_DIR)$(PLUGIN_TEST_DIRS) $(UNITTEST_EXTRA_OPTS) || env FAILED_DIR=$(FAILED_DIR) COMPRESS_FAILED_TEST_LOGS=$(COMPRESS_FAILED_TEST_LOGS) scripts/compress_failed.sh
 endef
 
 .PHONY: sanity