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 1c7ce921cbb..454ab01c83f 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
@@ -24352,6 +24352,12 @@ public class DiagnosticCompilerTestFE10TestdataTestGenerated extends AbstractDia
         runTest("compiler/testData/diagnostics/tests/modifiers/openInInterface.kt");
       }
 
+      @Test
+      @TestMetadata("OpenInterface.kt")
+      public void testOpenInterface() {
+        runTest("compiler/testData/diagnostics/tests/modifiers/OpenInterface.kt");
+      }
+
       @Test
       @TestMetadata("primaryConstructorMissingBrackets.kt")
       public void testPrimaryConstructorMissingBrackets() {
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 58cb0d03613..38528dfa600 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
@@ -24352,6 +24352,12 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated
         runTest("compiler/testData/diagnostics/tests/modifiers/openInInterface.kt");
       }
 
+      @Test
+      @TestMetadata("OpenInterface.kt")
+      public void testOpenInterface() {
+        runTest("compiler/testData/diagnostics/tests/modifiers/OpenInterface.kt");
+      }
+
       @Test
       @TestMetadata("primaryConstructorMissingBrackets.kt")
       public void testPrimaryConstructorMissingBrackets() {
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeOldFrontendDiagnosticsTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeOldFrontendDiagnosticsTestGenerated.java
index 93a5bdb8592..455c81bc9f1 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeOldFrontendDiagnosticsTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeOldFrontendDiagnosticsTestGenerated.java
@@ -24346,6 +24346,12 @@ public class FirLightTreeOldFrontendDiagnosticsTestGenerated extends AbstractFir
         runTest("compiler/testData/diagnostics/tests/modifiers/openInInterface.kt");
       }
 
+      @Test
+      @TestMetadata("OpenInterface.kt")
+      public void testOpenInterface() {
+        runTest("compiler/testData/diagnostics/tests/modifiers/OpenInterface.kt");
+      }
+
       @Test
       @TestMetadata("primaryConstructorMissingBrackets.kt")
       public void testPrimaryConstructorMissingBrackets() {
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiOldFrontendDiagnosticsTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiOldFrontendDiagnosticsTestGenerated.java
index 76a5ff18383..40db665ccfc 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiOldFrontendDiagnosticsTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiOldFrontendDiagnosticsTestGenerated.java
@@ -24352,6 +24352,12 @@ public class FirPsiOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiDia
         runTest("compiler/testData/diagnostics/tests/modifiers/openInInterface.kt");
       }
 
+      @Test
+      @TestMetadata("OpenInterface.kt")
+      public void testOpenInterface() {
+        runTest("compiler/testData/diagnostics/tests/modifiers/OpenInterface.kt");
+      }
+
       @Test
       @TestMetadata("primaryConstructorMissingBrackets.kt")
       public void testPrimaryConstructorMissingBrackets() {
diff --git a/compiler/testData/diagnostics/tests/modifiers/OpenInterface.fir.kt b/compiler/testData/diagnostics/tests/modifiers/OpenInterface.fir.kt
new file mode 100644
index 00000000000..954d270a9fb
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/modifiers/OpenInterface.fir.kt
@@ -0,0 +1,15 @@
+// FIR_DUMP
+<!REDUNDANT_MODIFIER_FOR_TARGET!>open<!> interface OpenInterface {
+    fun <!ABSTRACT_FUNCTION_IN_NON_ABSTRACT_CLASS!>defaultModalityFuncWithoutBody<!>()
+    fun defaultModalityFuncWithBody() {}
+    <!ABSTRACT_FUNCTION_IN_NON_ABSTRACT_CLASS!>abstract<!> fun abstractFunc()
+    open fun openFunc() {}
+
+    val <!ABSTRACT_PROPERTY_IN_NON_ABSTRACT_CLASS!>defaultModalityValWithoutGetter<!>: Any
+    val defaultModalityValWithGetter: Any get() = 42
+    <!ABSTRACT_PROPERTY_IN_NON_ABSTRACT_CLASS!>abstract<!> val abstractVal: Any
+    open val openVal: Any get() = 42
+
+    <!ABSTRACT_PROPERTY_IN_NON_ABSTRACT_CLASS!>abstract<!> val abstractValWithGetter: Any get() = 42
+    <!ABSTRACT_PROPERTY_IN_NON_ABSTRACT_CLASS!>abstract<!> var abstractValWithSetter: Any set(value) {}
+}
diff --git a/compiler/testData/diagnostics/tests/modifiers/OpenInterface.fir.txt b/compiler/testData/diagnostics/tests/modifiers/OpenInterface.fir.txt
new file mode 100644
index 00000000000..c4a46d68c19
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/modifiers/OpenInterface.fir.txt
@@ -0,0 +1,39 @@
+FILE: OpenInterface.fir.kt
+    public open interface OpenInterface : R|kotlin/Any| {
+        public abstract fun defaultModalityFuncWithoutBody(): R|kotlin/Unit|
+
+        public open fun defaultModalityFuncWithBody(): R|kotlin/Unit| {
+        }
+
+        public abstract fun abstractFunc(): R|kotlin/Unit|
+
+        public open fun openFunc(): R|kotlin/Unit| {
+        }
+
+        public abstract val defaultModalityValWithoutGetter: R|kotlin/Any|
+            public get(): R|kotlin/Any|
+
+        public open val defaultModalityValWithGetter: R|kotlin/Any|
+            public get(): R|kotlin/Any| {
+                ^ Int(42)
+            }
+
+        public abstract val abstractVal: R|kotlin/Any|
+            public get(): R|kotlin/Any|
+
+        public open val openVal: R|kotlin/Any|
+            public get(): R|kotlin/Any| {
+                ^ Int(42)
+            }
+
+        public abstract val abstractValWithGetter: R|kotlin/Any|
+            public get(): R|kotlin/Any| {
+                ^ Int(42)
+            }
+
+        public abstract var abstractValWithSetter: R|kotlin/Any|
+            public get(): R|kotlin/Any|
+            public set(value: R|kotlin/Any|): R|kotlin/Unit| {
+            }
+
+    }
diff --git a/compiler/testData/diagnostics/tests/modifiers/OpenInterface.kt b/compiler/testData/diagnostics/tests/modifiers/OpenInterface.kt
new file mode 100644
index 00000000000..f6e7e321a6c
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/modifiers/OpenInterface.kt
@@ -0,0 +1,15 @@
+// FIR_DUMP
+<!REDUNDANT_MODIFIER_FOR_TARGET!>open<!> interface OpenInterface {
+    fun defaultModalityFuncWithoutBody()
+    fun defaultModalityFuncWithBody() {}
+    abstract fun abstractFunc()
+    open fun openFunc() {}
+
+    val defaultModalityValWithoutGetter: Any
+    val defaultModalityValWithGetter: Any get() = 42
+    abstract val abstractVal: Any
+    open val openVal: Any get() = 42
+
+    abstract val abstractValWithGetter: Any <!ABSTRACT_PROPERTY_WITH_GETTER!>get() = 42<!>
+    abstract var abstractValWithSetter: Any <!ABSTRACT_PROPERTY_WITH_SETTER!>set(value) {}<!>
+}
diff --git a/compiler/testData/diagnostics/tests/modifiers/OpenInterface.txt b/compiler/testData/diagnostics/tests/modifiers/OpenInterface.txt
new file mode 100644
index 00000000000..bd0c3ba06c0
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/modifiers/OpenInterface.txt
@@ -0,0 +1,18 @@
+package
+
+public interface OpenInterface {
+    public abstract val abstractVal: kotlin.Any
+    public abstract val abstractValWithGetter: kotlin.Any
+    public abstract var abstractValWithSetter: kotlin.Any
+    public open val defaultModalityValWithGetter: kotlin.Any
+    public abstract val defaultModalityValWithoutGetter: kotlin.Any
+    public open val openVal: kotlin.Any
+    public abstract fun abstractFunc(): kotlin.Unit
+    public open fun defaultModalityFuncWithBody(): kotlin.Unit
+    public abstract fun defaultModalityFuncWithoutBody(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open fun openFunc(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
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 ef09852d34d..89ce284fa01 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
@@ -24352,6 +24352,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
         runTest("compiler/testData/diagnostics/tests/modifiers/openInInterface.kt");
       }
 
+      @Test
+      @TestMetadata("OpenInterface.kt")
+      public void testOpenInterface() {
+        runTest("compiler/testData/diagnostics/tests/modifiers/OpenInterface.kt");
+      }
+
       @Test
       @TestMetadata("primaryConstructorMissingBrackets.kt")
       public void testPrimaryConstructorMissingBrackets() {