diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/IdeaModuleInfos.kt b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/IdeaModuleInfos.kt
index 3aaf626cd0d..04fe67dfe0d 100644
--- a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/IdeaModuleInfos.kt
+++ b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/IdeaModuleInfos.kt
@@ -54,6 +54,7 @@ import org.jetbrains.kotlin.platform.jvm.isJvm
 import org.jetbrains.kotlin.platform.konan.isNative
 import org.jetbrains.kotlin.resolve.PlatformDependentAnalyzerServices
 import org.jetbrains.kotlin.resolve.jvm.platform.JvmPlatformAnalyzerServices
+import org.jetbrains.kotlin.types.typeUtil.closure
 import org.jetbrains.kotlin.utils.addIfNotNull
 import java.util.*
 
@@ -218,7 +219,9 @@ data class ModuleTestSourceInfo internal constructor(override val module: Module
                 list.addIfNotNull(it.productionSourceInfo())
             }
 
-            list
+            list.addAll(list.closure { it.expectedBy })
+
+            list.toHashSet()
         }
 
     private object KeyForModulesWhoseInternalsAreVisible