diff --git a/prism/Makefile b/prism/Makefile
index 084d28af..bbe29d57 100644
--- a/prism/Makefile
+++ b/prism/Makefile
@@ -402,14 +402,14 @@ make_dirs:
 
 tests: testslocal
 	@if [ -d ~/prism/prism-tests ]; then \
-	  cd ~/prism/prism-tests && $(PWD)/etc/scripts/prism-auto -t -m . -p $(PWD)/bin/prism; \
+	  cd ~/prism/prism-tests && $(PWD)/etc/scripts/prism-auto -t -m . -p $(PWD)/bin/prism --nailgun; \
 	else \
 	  echo "Skipping tests"; \
 	fi
 
 testslocal:
 	@if [ -d tests ]; then \
-	  cd tests && $(PWD)/etc/scripts/prism-auto -t -m . -p $(PWD)/bin/prism; \
+	  cd tests && $(PWD)/etc/scripts/prism-auto -t -m . -p $(PWD)/bin/prism --nailgun; \
 	else \
 	  echo "Skipping local tests"; \
 	fi