diff --git a/.github/workflows/integ-test-restore-configuration-cache.yml b/.github/workflows/integ-test-restore-configuration-cache.yml
index 1916563..ea0e161 100644
--- a/.github/workflows/integ-test-restore-configuration-cache.yml
+++ b/.github/workflows/integ-test-restore-configuration-cache.yml
@@ -34,8 +34,8 @@ jobs:
       uses: ./
       with:
         cache-read-only: false # For testing, allow writing cache entries on non-default branches
-        cache-encryption-key: Da25KUVSE5jbGds2zXmfXw==
-        gradle-version: release-nightly
+        cache-encryption-key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
+        gradle-version: 8.6-rc-1
     - name: Groovy build with configuration-cache enabled
       working-directory: .github/workflow-samples/groovy-dsl
       run: gradle test --configuration-cache
@@ -57,8 +57,8 @@ jobs:
       uses: ./
       with:
         cache-read-only: true
-        cache-encryption-key: Da25KUVSE5jbGds2zXmfXw==
-        gradle-version: release-nightly
+        cache-encryption-key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
+        gradle-version: 8.6-rc-1
     - name: Groovy build with configuration-cache enabled
       id: execute
       working-directory: .github/workflow-samples/groovy-dsl
@@ -92,8 +92,8 @@ jobs:
         GRADLE_BUILD_ACTION_SKIP_RESTORE: "generated-gradle-jars|wrapper-zips|java-toolchains|instrumented-jars|dependencies|kotlin-dsl"
       with:
         cache-read-only: true
-        cache-encryption-key: Da25KUVSE5jbGds2zXmfXw==
-        gradle-version: release-nightly
+        cache-encryption-key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
+        gradle-version: 8.6-rc-1
     - name: Check execute Gradle build with configuration cache enabled (but not restored)
       working-directory: .github/workflow-samples/groovy-dsl
       run: gradle test --configuration-cache
@@ -114,8 +114,8 @@ jobs:
       uses: ./
       with:
         cache-read-only: false # For testing, allow writing cache entries on non-default branches
-        cache-encryption-key: Da25KUVSE5jbGds2zXmfXw==
-        gradle-version: release-nightly
+        cache-encryption-key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
+        gradle-version: 8.6-rc-1
     - name: Execute 'help' with configuration-cache enabled
       working-directory: .github/workflow-samples/kotlin-dsl
       run: gradle help --configuration-cache
@@ -137,8 +137,8 @@ jobs:
       uses: ./
       with:
         cache-read-only: false # For testing, allow writing cache entries on non-default branches
-        cache-encryption-key: Da25KUVSE5jbGds2zXmfXw==
-        gradle-version: release-nightly
+        cache-encryption-key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
+        gradle-version: 8.6-rc-1
     - name: Execute 'test' with configuration-cache enabled
       working-directory: .github/workflow-samples/kotlin-dsl
       run: gradle test --configuration-cache
@@ -161,8 +161,8 @@ jobs:
       uses: ./
       with:
         cache-read-only: true
-        cache-encryption-key: Da25KUVSE5jbGds2zXmfXw==
-        gradle-version: release-nightly
+        cache-encryption-key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
+        gradle-version: 8.6-rc-1
     - name: Execute 'test' again with configuration-cache enabled
       id: execute
       working-directory: .github/workflow-samples/kotlin-dsl