diff --git a/.github/workflows/workflows.yaml b/.github/workflows/workflows.yaml
index 8073bd5..47adcef 100644
--- a/.github/workflows/workflows.yaml
+++ b/.github/workflows/workflows.yaml
@@ -10,11 +10,11 @@ jobs:
       matrix:
         java: [ 17 ]
         kubernetes:
-          #- 'v1.24.17'
-          #- 'v1.25.15'
-          #- 'v1.26.14'
-          #- 'v1.27.11'
-          #- 'v1.28.7'
+          - 'v1.24.17'
+          - 'v1.25.15'
+          - 'v1.26.14'
+          - 'v1.27.11'
+          - 'v1.28.7'
           - 'v1.29.2'
 
     steps:
diff --git a/src/test/kotlin/eu/openanalytics/shinyproxyoperator/helpers/junit/TestExecutionListener.kt b/src/test/kotlin/eu/openanalytics/shinyproxyoperator/helpers/junit/TestExecutionListener.kt
index accb2cb..5d8983c 100644
--- a/src/test/kotlin/eu/openanalytics/shinyproxyoperator/helpers/junit/TestExecutionListener.kt
+++ b/src/test/kotlin/eu/openanalytics/shinyproxyoperator/helpers/junit/TestExecutionListener.kt
@@ -29,7 +29,9 @@ class TestExecutionListener : SummaryGeneratingListener() {
 
     init {
         Runtime.getRuntime().addShutdownHook(Thread {
-            summary.printTo(PrintWriter(System.out))
+            if (summary != null) {
+                summary.printTo(PrintWriter(System.out))
+            }
         })
     }
 
@@ -60,4 +62,4 @@ class TestExecutionListener : SummaryGeneratingListener() {
         println()
     }
 
-}
\ No newline at end of file
+}