diff --git a/plugins/fir/fir-plugin-prototype/build.gradle.kts b/plugins/fir/fir-plugin-prototype/build.gradle.kts
index 0352d824777..2f956f5ddac 100644
--- a/plugins/fir/fir-plugin-prototype/build.gradle.kts
+++ b/plugins/fir/fir-plugin-prototype/build.gradle.kts
@@ -62,6 +62,7 @@ if (kotlinBuildProperties.isInJpsBuildIdeaSync) {
 
 projectTest(parallel = true, jUnitMode = JUnitMode.JUnit5) {
     workingDir = rootDir
+    useJUnitPlatform()
     jvmArgs!!.removeIf { it.contains("-Xmx") }
     maxHeapSize = "3g"
     dependsOn(":plugins:fir:fir-plugin-prototype:plugin-annotations:jar")