diff --git a/src/php/bin/run_tests.sh b/src/php/bin/run_tests.sh
index d221e6664298996360da7f1e88b2398c3a6f2efb..50175e5b0676b80a701f08119969b6505ee47c59 100755
--- a/src/php/bin/run_tests.sh
+++ b/src/php/bin/run_tests.sh
@@ -3,4 +3,4 @@
 # against it
 cd $(dirname $0)
 php -d extension_dir=../ext/grpc/modules/ -d extension=grpc.so \
-  /usr/local/bin/phpunit -v --debug --strict ../tests/unit_tests
+  phpunit -v --debug --strict ../tests/unit_tests