diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index ed647d96..c8b8ea88 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -1,5 +1,12 @@
 name: Main workflow
-on: [push]
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+      - releases/*
+
 jobs:
   build:
     name: Build
diff --git a/__tests__/verify-node-version.sh b/__tests__/verify-node-version.sh
index 15a5ae12..03823666 100755
--- a/__tests__/verify-node-version.sh
+++ b/__tests__/verify-node-version.sh
@@ -1,15 +1,13 @@
 #!/bin/sh
 
-if [[ -z "$1" ]]; then
+if [ -z "$1" ]; then
   echo "Must supply version argument"
   exit 1
 fi
 
 node_version="$(node --version)"
 echo "Found node version '$node_version'"
-if [[ $node_version =~ "v$1" ]]; then
-  echo "Success. Version matches 'v$1'"
-else
+if [ -z "$(echo $node_version | grep v$1)" ]; then
   echo "Unexpected version"
   exit 1
 fi
\ No newline at end of file