diff --git a/.github/workflows/test-application.yaml b/.github/workflows/test-application.yaml
index 55f0a4fd..d54a4dfd 100644
--- a/.github/workflows/test-application.yaml
+++ b/.github/workflows/test-application.yaml
@@ -11,7 +11,7 @@ on:
 jobs:
     test:
         name: 'PHP ${{ matrix.php-version }} ${{ matrix.dependencies }}'
-        runs-on: ubuntu-18.04
+        runs-on: ubuntu-22.04
 
         strategy:
             fail-fast: false
@@ -24,11 +24,26 @@ jobs:
                     - php-version: '8.0'
                     - php-version: '8.1'
                     - php-version: '8.2'
+                    - php-version: '8.3'
 
         steps:
             - name: Checkout project
               uses: actions/checkout@v3
 
+            - name: Cache Jackrabbit
+              id: cache-jackrabbit
+              uses: actions/cache@v3
+              with:
+                path: bin/jackrabbit-standalone-*
+                key: jackrabbit
+
+            # default java installation not able to run newer versions of jackrabbit
+            - name: Install and configure Java
+              uses: actions/setup-java@v3
+              with:
+                  distribution: temurin
+                  java-version: '8'
+
             - name: Install and configure PHP
               uses: shivammathur/setup-php@v2
               with:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc61f691..c86d365f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,11 @@ Version 2
 Version 1
 =========
 
+1.4.5
+-----
+
+* Improved the bin/jackrabbit.sh script to detect when the .jar fails to be started.
+
 1.4.4
 -----
 
diff --git a/bin/jackrabbit.sh b/bin/jackrabbit.sh
index d59116ed..c4e5077f 100755
--- a/bin/jackrabbit.sh
+++ b/bin/jackrabbit.sh
@@ -9,16 +9,29 @@ JAR=jackrabbit-standalone-$VERSION.jar
 # download jackrabbit jar from archive, as the dist only contains the latest
 # stable versions
 if [ ! -f "$DIR/$JAR" ]; then
-    wget http://archive.apache.org/dist/jackrabbit/$VERSION/$JAR
+    wget -nv http://archive.apache.org/dist/jackrabbit/$VERSION/$JAR
 fi
 
 java -jar $DIR/$JAR&
+pid=$!
+echo "started prodcess $pid"
 
 echo "Waiting until Jackrabbit is ready on port 8080"
 while [[ -z `curl -s 'http://localhost:8080' ` ]]
 do
     echo -n "."
     sleep 2s
+    count=$(ps | grep "$pid[^[]" | wc -l)
+    if [[ $count -eq 0 ]]
+    then
+        echo "process $pid not found, waiting on it to determine exit status"
+        if wait $pid; then
+		echo "jackrabbit terminated with success status (this should not happen)"
+        else
+                echo "jackrabbit failed (returned $?)"
+        fi
+	exit 1
+    fi
 done
 
 echo "Jackrabbit is up"
diff --git a/src/Jackalope/Tools/Console/Helper/JackrabbitHelper.php b/src/Jackalope/Tools/Console/Helper/JackrabbitHelper.php
index 9f4225f3..307579dc 100644
--- a/src/Jackalope/Tools/Console/Helper/JackrabbitHelper.php
+++ b/src/Jackalope/Tools/Console/Helper/JackrabbitHelper.php
@@ -65,6 +65,7 @@ public function isServerRunning(): bool
     public function getServerPid(): string
     {
         $pid = trim(shell_exec("pgrep -f -n 'java \-jar {$this->jackrabbit_jar}'"));
+
         // TODO: check it's a valid pid
         return $pid;
     }
diff --git a/src/Jackalope/Transport/Jackrabbit/EventBuffer.php b/src/Jackalope/Transport/Jackrabbit/EventBuffer.php
index 726f9443..31e9cac2 100644
--- a/src/Jackalope/Transport/Jackrabbit/EventBuffer.php
+++ b/src/Jackalope/Transport/Jackrabbit/EventBuffer.php
@@ -2,7 +2,6 @@
 
 namespace Jackalope\Transport\Jackrabbit;
 
-use DOMElement;
 use Jackalope\FactoryInterface;
 use Jackalope\Observation\Event;
 use Jackalope\Observation\EventFilter;
diff --git a/tests/ImplementationLoader.php b/tests/ImplementationLoader.php
index f3c60414..699e4f67 100644
--- a/tests/ImplementationLoader.php
+++ b/tests/ImplementationLoader.php
@@ -5,7 +5,7 @@
  */
 class ImplementationLoader extends \PHPCR\Test\AbstractLoader
 {
-    private static $instance = null;
+    private static $instance;
 
     private $necessaryConfigValues = ['jackrabbit.uri', 'phpcr.user', 'phpcr.pass', 'phpcr.workspace', 'phpcr.additionalWorkspace', 'phpcr.defaultWorkspace'];