diff --git a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java
index dbbde1765a0..522242a44a3 100644
--- a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java
+++ b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java
@@ -25016,6 +25016,12 @@ public class DiagnosticCompilerTestFE10TestdataTestGenerated extends AbstractDia
         runTest("compiler/testData/diagnostics/tests/multiplatform/incompatibles.kt");
       }
 
+      @Test
+      @TestMetadata("JsExternalTypeExtendsActualExternalType.kt")
+      public void testJsExternalTypeExtendsActualExternalType() {
+        runTest("compiler/testData/diagnostics/tests/multiplatform/JsExternalTypeExtendsActualExternalType.kt");
+      }
+
       @Test
       @TestMetadata("kt54827.kt")
       public void testKt54827() {
diff --git a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java
index 9791ff6c7c3..f2032b78a2f 100644
--- a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java
+++ b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java
@@ -25016,6 +25016,12 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated
         runTest("compiler/testData/diagnostics/tests/multiplatform/incompatibles.kt");
       }
 
+      @Test
+      @TestMetadata("JsExternalTypeExtendsActualExternalType.kt")
+      public void testJsExternalTypeExtendsActualExternalType() {
+        runTest("compiler/testData/diagnostics/tests/multiplatform/JsExternalTypeExtendsActualExternalType.kt");
+      }
+
       @Test
       @TestMetadata("kt54827.kt")
       public void testKt54827() {
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendMPPDiagnosticsWithLightTreeTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendMPPDiagnosticsWithLightTreeTestGenerated.java
index 5258c8dc346..7d640626b95 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendMPPDiagnosticsWithLightTreeTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendMPPDiagnosticsWithLightTreeTestGenerated.java
@@ -265,6 +265,12 @@ public class FirOldFrontendMPPDiagnosticsWithLightTreeTestGenerated extends Abst
     runTest("compiler/testData/diagnostics/tests/multiplatform/incompatibles.kt");
   }
 
+  @Test
+  @TestMetadata("JsExternalTypeExtendsActualExternalType.kt")
+  public void testJsExternalTypeExtendsActualExternalType() {
+    runTest("compiler/testData/diagnostics/tests/multiplatform/JsExternalTypeExtendsActualExternalType.kt");
+  }
+
   @Test
   @TestMetadata("kt54827.kt")
   public void testKt54827() {
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendMPPDiagnosticsWithPsiTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendMPPDiagnosticsWithPsiTestGenerated.java
index 870f81cc6e1..8bf9c883bf2 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendMPPDiagnosticsWithPsiTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendMPPDiagnosticsWithPsiTestGenerated.java
@@ -265,6 +265,12 @@ public class FirOldFrontendMPPDiagnosticsWithPsiTestGenerated extends AbstractFi
     runTest("compiler/testData/diagnostics/tests/multiplatform/incompatibles.kt");
   }
 
+  @Test
+  @TestMetadata("JsExternalTypeExtendsActualExternalType.kt")
+  public void testJsExternalTypeExtendsActualExternalType() {
+    runTest("compiler/testData/diagnostics/tests/multiplatform/JsExternalTypeExtendsActualExternalType.kt");
+  }
+
   @Test
   @TestMetadata("kt54827.kt")
   public void testKt54827() {
diff --git a/compiler/testData/diagnostics/tests/multiplatform/JsExternalTypeExtendsActualExternalType.fir.kt b/compiler/testData/diagnostics/tests/multiplatform/JsExternalTypeExtendsActualExternalType.fir.kt
new file mode 100644
index 00000000000..7ac952ccdfd
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/multiplatform/JsExternalTypeExtendsActualExternalType.fir.kt
@@ -0,0 +1,13 @@
+// MODULE: commonjs
+// TARGET_PLATFORM: JS
+// FILE: commonjs.kt
+
+expect interface ExternalInterface
+
+external class <!EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE!>ExternalClass<!>: ExternalInterface
+
+// MODULE: js()()(commonjs)
+// TARGET_PLATFORM: JS
+// FILE: js.kt
+
+actual external interface ExternalInterface
diff --git a/compiler/testData/diagnostics/tests/multiplatform/JsExternalTypeExtendsActualExternalType.kt b/compiler/testData/diagnostics/tests/multiplatform/JsExternalTypeExtendsActualExternalType.kt
new file mode 100644
index 00000000000..6d37bd65f2a
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/multiplatform/JsExternalTypeExtendsActualExternalType.kt
@@ -0,0 +1,13 @@
+// MODULE: commonjs
+// TARGET_PLATFORM: JS
+// FILE: commonjs.kt
+
+expect interface <!NO_ACTUAL_FOR_EXPECT!>ExternalInterface<!>
+
+external class <!EXTERNAL_TYPE_EXTENDS_NON_EXTERNAL_TYPE!>ExternalClass<!>: ExternalInterface
+
+// MODULE: js()()(commonjs)
+// TARGET_PLATFORM: JS
+// FILE: js.kt
+
+actual external interface ExternalInterface
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
index 58eb8d4c373..700a8483b1f 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
@@ -25016,6 +25016,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
         runTest("compiler/testData/diagnostics/tests/multiplatform/incompatibles.kt");
       }
 
+      @Test
+      @TestMetadata("JsExternalTypeExtendsActualExternalType.kt")
+      public void testJsExternalTypeExtendsActualExternalType() {
+        runTest("compiler/testData/diagnostics/tests/multiplatform/JsExternalTypeExtendsActualExternalType.kt");
+      }
+
       @Test
       @TestMetadata("kt54827.kt")
       public void testKt54827() {