diff --git a/docs/test/README.md b/docs/test/README.md
index 84f2a8a3..26525188 100644
--- a/docs/test/README.md
+++ b/docs/test/README.md
@@ -34,3 +34,8 @@ end
 sh test.sh
 ```
 
+If you want to run with valgrind, set the environment variables `NGINX_RUNNER` and `NGINX_HEATTIME`.
+
+```console
+$ NGINX_RUNNER=valgrind NGINX_HEATTIME=10 sh test.sh
+```
diff --git a/test.sh b/test.sh
index 20ec575c..f369ace9 100755
--- a/test.sh
+++ b/test.sh
@@ -119,6 +119,9 @@ do
     fi
 done
 
+: ${NGINX_RUNNER:=exec}
+: ${NGINX_HEATTIME:=2}
+
 echo "====================================="
 echo ""
 echo "ngx_mruby starting and logging"
@@ -126,12 +129,13 @@ echo ""
 echo "====================================="
 echo ""
 echo ""
-${NGINX_INSTALL_DIR}/sbin/nginx &
+${NGINX_RUNNER} ${NGINX_INSTALL_DIR}/sbin/nginx &
+nginx_pid=$!
+trap "kill $nginx_pid; wait" EXIT
 echo ""
 echo ""
-sleep 2 # waiting for nginx
+sleep ${NGINX_HEATTIME} # waiting for nginx
 ./mruby/build/test/bin/mruby ./test/t/ngx_mruby.rb 2> ${NGINX_INSTALL_DIR}/logs/stderr.log
-$KILLALL nginx
 echo "ngx_mruby testing ... Done"
 
 echo "test.sh ... successful"