diff --git a/compiler/tests-common-new/build.gradle.kts b/compiler/tests-common-new/build.gradle.kts
index 74a5321a4c0..28ee66a4875 100644
--- a/compiler/tests-common-new/build.gradle.kts
+++ b/compiler/tests-common-new/build.gradle.kts
@@ -57,7 +57,8 @@ sourceSets {
 projectTest(
     jUnitMode = JUnitMode.JUnit5,
     defineJDKEnvVariables = listOf(
-        JdkMajorVersion.JDK_11_0 // e.g. org.jetbrains.kotlin.test.runners.ForeignAnnotationsCompiledJavaTestGenerated.Java11Tests
+        JdkMajorVersion.JDK_11_0, // e.g. org.jetbrains.kotlin.test.runners.ForeignAnnotationsCompiledJavaTestGenerated.Java11Tests
+        JdkMajorVersion.JDK_21_0, // e.g. org.jetbrains.kotlin.test.runners.codegen.FirLightTreeBlackBoxModernJdkCodegenTestGenerated.TestsWithJava21
     )
 ) {
     dependsOn(":dist")