diff --git a/tests/src/org.eclipse.jetty/jetty-client/11.0.12/build.gradle b/tests/src/org.eclipse.jetty/jetty-client/11.0.12/build.gradle
index a8938e413..691ce10a7 100644
--- a/tests/src/org.eclipse.jetty/jetty-client/11.0.12/build.gradle
+++ b/tests/src/org.eclipse.jetty/jetty-client/11.0.12/build.gradle
@@ -19,6 +19,11 @@ dependencies {
 }
 
 graalvmNative {
+    binaries {
+        test {
+            buildArgs.add('--enable-preview')
+        }
+    }
     agent {
         defaultMode = "conditional"
         modes {
diff --git a/tests/src/org.eclipse.jetty/jetty-server/11.0.12/build.gradle b/tests/src/org.eclipse.jetty/jetty-server/11.0.12/build.gradle
index c3a80d5cd..99096f82f 100644
--- a/tests/src/org.eclipse.jetty/jetty-server/11.0.12/build.gradle
+++ b/tests/src/org.eclipse.jetty/jetty-server/11.0.12/build.gradle
@@ -22,6 +22,11 @@ dependencies {
 }
 
 graalvmNative {
+    binaries {
+        test {
+            buildArgs.add('--enable-preview')
+        }
+    }
     agent {
         defaultMode = "conditional"
         modes {
diff --git a/tests/src/org.jetbrains.kotlin/kotlin-reflect/1.7.10/build.gradle b/tests/src/org.jetbrains.kotlin/kotlin-reflect/1.7.10/build.gradle
index dee986ee0..a1cb3caa9 100644
--- a/tests/src/org.jetbrains.kotlin/kotlin-reflect/1.7.10/build.gradle
+++ b/tests/src/org.jetbrains.kotlin/kotlin-reflect/1.7.10/build.gradle
@@ -16,6 +16,10 @@ dependencies {
     testImplementation 'org.assertj:assertj-core:3.22.0'
 }
 
+compileTestKotlin {
+    kotlinOptions.jvmTarget = "17"
+}
+
 graalvmNative {
     agent {
         defaultMode = "conditional"
diff --git a/tests/tck-build-logic/src/main/groovy/org.graalvm.internal.tck-harness.gradle b/tests/tck-build-logic/src/main/groovy/org.graalvm.internal.tck-harness.gradle
index 1b4826ca9..92eaa51bb 100644
--- a/tests/tck-build-logic/src/main/groovy/org.graalvm.internal.tck-harness.gradle
+++ b/tests/tck-build-logic/src/main/groovy/org.graalvm.internal.tck-harness.gradle
@@ -87,7 +87,7 @@ if (project.hasProperty("baseCommit")) {
 
 def matrixDefault = [
         "versions" : [
-//                [ "graalvm": "dev", "java": "dev" ], // TODO: uncomment this once we are ready to run tests on JDK19
+                [ "graalvm": "dev", "java": "dev" ],
                 [ "graalvm": "latest", "java": "17"]
         ],
         "os"          : ["ubuntu-latest"] // TODO: Add support for "windows-latest", "macos-latest"