diff --git a/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/fir/handlers/FirDiagnosticsHandler.kt b/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/fir/handlers/FirDiagnosticsHandler.kt
index cc4641f1222..a8937db06cc 100644
--- a/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/fir/handlers/FirDiagnosticsHandler.kt
+++ b/compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/fir/handlers/FirDiagnosticsHandler.kt
@@ -643,7 +643,7 @@ open class FirDiagnosticCollectorService(val testServices: TestServices) : TestS
 
             for (part in info.partsForDependsOnModules) {
                 result += part.session.runCheckers(
-                    platformPart.firAnalyzerFacade.scopeSession,
+                    part.firAnalyzerFacade.scopeSession,
                     part.firFiles.values,
                     DiagnosticReporterFactory.createPendingReporter(),
                     mppCheckerKind = MppCheckerKind.Common