diff --git a/analysis/analysis-api-fe10/src/org/jetbrains/kotlin/analysis/api/descriptors/components/KtFe10SymbolDeclarationOverridesProvider.kt b/analysis/analysis-api-fe10/src/org/jetbrains/kotlin/analysis/api/descriptors/components/KtFe10SymbolDeclarationOverridesProvider.kt
index e1b05d65767..536b50764dc 100644
--- a/analysis/analysis-api-fe10/src/org/jetbrains/kotlin/analysis/api/descriptors/components/KtFe10SymbolDeclarationOverridesProvider.kt
+++ b/analysis/analysis-api-fe10/src/org/jetbrains/kotlin/analysis/api/descriptors/components/KtFe10SymbolDeclarationOverridesProvider.kt
@@ -73,6 +73,8 @@ internal class KtFe10SymbolDeclarationOverridesProvider(
     }
 
     override fun isSubClassOf(subClass: KtClassOrObjectSymbol, superClass: KtClassOrObjectSymbol): Boolean {
+        if (subClass == superClass) return false
+
         val subClassDescriptor = getSymbolDescriptor(subClass) as? ClassDescriptor ?: return false
         val superClassDescriptor = getSymbolDescriptor(superClass) as? ClassDescriptor ?: return false
         return subClassDescriptor.isSubclassOf(superClassDescriptor)
diff --git a/analysis/analysis-api/testData/components/symbolDeclarationOverridesProvider/isSubclassOf/sameClass.descriptors.txt b/analysis/analysis-api/testData/components/symbolDeclarationOverridesProvider/isSubclassOf/sameClass.descriptors.txt
deleted file mode 100644
index f47502b604e..00000000000
--- a/analysis/analysis-api/testData/components/symbolDeclarationOverridesProvider/isSubclassOf/sameClass.descriptors.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-IS_SUBCLASS: true
-IS_DIRECT_SUBCLASS: false