diff --git a/.github/workflows/validation.yml b/.github/workflows/validation.yml
index 7b4342e..0172910 100644
--- a/.github/workflows/validation.yml
+++ b/.github/workflows/validation.yml
@@ -8,8 +8,25 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+
+  codeChecks:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+          cache: gradle
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v3
+      - name: Check Spotless
+        run: ./gradlew spotlessCheck
+
   buildPlugin:
     runs-on: ubuntu-latest
+    needs: codeChecks
     steps:
       - uses: actions/checkout@v4
       - name: Set up JDK 21
@@ -36,6 +53,7 @@ jobs:
 
   runPluginVerifier:
     runs-on: ubuntu-latest
+    needs: codeChecks
     steps:
       - uses: actions/checkout@v4
       - name: Set up JDK 21
diff --git a/src/main/kotlin/com/vaadin/plugin/VaadinProjectDetector.kt b/src/main/kotlin/com/vaadin/plugin/VaadinProjectDetector.kt
index 3ccef8a..ce8ec03 100644
--- a/src/main/kotlin/com/vaadin/plugin/VaadinProjectDetector.kt
+++ b/src/main/kotlin/com/vaadin/plugin/VaadinProjectDetector.kt
@@ -13,7 +13,7 @@ class VaadinProjectDetector : ModuleRootListener, ProjectActivity {
     private val LOG: Logger = Logger.getInstance(VaadinProjectDetector::class.java)
 
     override fun rootsChanged(event: ModuleRootEvent) {
-        if (isVaadinProject(event.project)) {
+        if (event.project.isOpen && isVaadinProject(event.project)) {
             doNotifyAboutVaadinProject(event.project)
             LOG.info("Vaadin detected in dependencies of " + event.project.name)
         }
diff --git a/src/main/kotlin/com/vaadin/plugin/hotswapagent/JdkUtil.kt b/src/main/kotlin/com/vaadin/plugin/hotswapagent/JdkUtil.kt
index 58c8a74..21e7f3c 100644
--- a/src/main/kotlin/com/vaadin/plugin/hotswapagent/JdkUtil.kt
+++ b/src/main/kotlin/com/vaadin/plugin/hotswapagent/JdkUtil.kt
@@ -18,7 +18,7 @@ class JdkUtil {
         fun isJetbrainsRuntime(jdk: Sdk?): Boolean {
             val homePath = jdk?.homePath ?: throw IllegalStateException("JDK has no home path: $jdk")
             val jdkInfo = JdkVersionDetector.getInstance().detectJdkVersionInfo(homePath)
-            return "JBR" == jdkInfo?.variant?.prefix
+            return "jbr" == jdkInfo?.variant?.prefix?.lowercase()
         }
 
         fun getBundledJetbrainsJdk(): Sdk {