diff --git a/compiler/fir/fir2ir/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java b/compiler/fir/fir2ir/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java
index af989b5d944..476cac4a14e 100644
--- a/compiler/fir/fir2ir/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java
+++ b/compiler/fir/fir2ir/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java
@@ -8535,6 +8535,21 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                 runTest("compiler/testData/codegen/box/defaultArguments/function/innerExtentionFunctionManyArgs.kt");
             }
 
+            @TestMetadata("kt15971.kt")
+            public void testKt15971() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971.kt");
+            }
+
+            @TestMetadata("kt15971_2.kt")
+            public void testKt15971_2() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt");
+            }
+
+            @TestMetadata("kt15971_3.kt")
+            public void testKt15971_3() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt");
+            }
+
             @TestMetadata("kt36188.kt")
             public void testKt36188() throws Exception {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/kt36188.kt");
diff --git a/compiler/testData/codegen/box/defaultArguments/function/kt15971.kt b/compiler/testData/codegen/box/defaultArguments/function/kt15971.kt
new file mode 100644
index 00000000000..feec1855fc3
--- /dev/null
+++ b/compiler/testData/codegen/box/defaultArguments/function/kt15971.kt
@@ -0,0 +1,19 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// IGNORE_BACKEND: JVM
+interface Q {
+    fun foo(a: Double): Double
+}
+
+interface Z {
+    fun foo(a: Double = 1.0): Double
+}
+
+class R : Q, Z {
+    override fun foo(a: Double) = a
+}
+
+fun box(): String {
+    if (R().foo() != 1.0) return "fail 1"
+    if (R().foo(2.0) != 2.0) return "fail 2"
+    return "OK"
+}
diff --git a/compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt b/compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt
new file mode 100644
index 00000000000..37e713b2899
--- /dev/null
+++ b/compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt
@@ -0,0 +1,19 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// IGNORE_BACKEND: JVM
+interface Q {
+    fun foo(a: Double) = 0.0
+}
+
+interface Z {
+    fun foo(a: Double = 1.0): Double
+}
+
+class R : Q, Z {
+    override fun foo(a: Double) = a
+}
+
+fun box(): String {
+    if (R().foo() != 1.0) return "fail 1"
+    if (R().foo(2.0) != 2.0) return "fail 2"
+    return "OK"
+}
diff --git a/compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt b/compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt
new file mode 100644
index 00000000000..b43de79557f
--- /dev/null
+++ b/compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt
@@ -0,0 +1,19 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+// IGNORE_BACKEND: JVM
+interface Q {
+    fun foo(a: Double): Double
+}
+
+interface Z {
+    fun foo(a: Double = 1.0) = 0.0
+}
+
+class R : Q, Z {
+    override fun foo(a: Double) = a
+}
+
+fun box(): String {
+    if (R().foo() != 1.0) return "fail 1"
+    if (R().foo(2.0) != 2.0) return "fail 2"
+    return "OK"
+}
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
index 34aad09a7ac..7850082e7ee 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
@@ -9680,6 +9680,21 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/innerExtentionFunctionManyArgs.kt");
             }
 
+            @TestMetadata("kt15971.kt")
+            public void testKt15971() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971.kt");
+            }
+
+            @TestMetadata("kt15971_2.kt")
+            public void testKt15971_2() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt");
+            }
+
+            @TestMetadata("kt15971_3.kt")
+            public void testKt15971_3() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt");
+            }
+
             @TestMetadata("kt36188.kt")
             public void testKt36188() throws Exception {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/kt36188.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
index 9d4c8b0fb22..4cf8729e1b3 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
@@ -9592,6 +9592,21 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 runTest("compiler/testData/codegen/box/defaultArguments/function/funInTraitChain.kt");
             }
 
+            @TestMetadata("kt15971.kt")
+            public void ignoreKt15971() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971.kt");
+            }
+
+            @TestMetadata("kt15971_2.kt")
+            public void ignoreKt15971_2() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt");
+            }
+
+            @TestMetadata("kt15971_3.kt")
+            public void ignoreKt15971_3() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt");
+            }
+
             private void runTest(String testDataFilePath) throws Exception {
                 KotlinTestUtils.runTest(this::doTest, TargetBackend.JVM, testDataFilePath);
             }
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
index 73a461b4ab4..2861347d121 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
@@ -8535,6 +8535,21 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 runTest("compiler/testData/codegen/box/defaultArguments/function/innerExtentionFunctionManyArgs.kt");
             }
 
+            @TestMetadata("kt15971.kt")
+            public void testKt15971() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971.kt");
+            }
+
+            @TestMetadata("kt15971_2.kt")
+            public void testKt15971_2() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt");
+            }
+
+            @TestMetadata("kt15971_3.kt")
+            public void testKt15971_3() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt");
+            }
+
             @TestMetadata("kt36188.kt")
             public void testKt36188() throws Exception {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/kt36188.kt");
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java
index 6470d494edb..85400f4f597 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java
@@ -7245,6 +7245,21 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/innerExtentionFunctionManyArgs.kt");
             }
 
+            @TestMetadata("kt15971.kt")
+            public void testKt15971() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971.kt");
+            }
+
+            @TestMetadata("kt15971_2.kt")
+            public void testKt15971_2() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt");
+            }
+
+            @TestMetadata("kt15971_3.kt")
+            public void testKt15971_3() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt");
+            }
+
             @TestMetadata("kt36188.kt")
             public void testKt36188() throws Exception {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/kt36188.kt");
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
index 17d9a3839b7..1a0de0464d4 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
@@ -7245,6 +7245,21 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/innerExtentionFunctionManyArgs.kt");
             }
 
+            @TestMetadata("kt15971.kt")
+            public void testKt15971() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971.kt");
+            }
+
+            @TestMetadata("kt15971_2.kt")
+            public void testKt15971_2() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_2.kt");
+            }
+
+            @TestMetadata("kt15971_3.kt")
+            public void testKt15971_3() throws Exception {
+                runTest("compiler/testData/codegen/box/defaultArguments/function/kt15971_3.kt");
+            }
+
             @TestMetadata("kt36188.kt")
             public void testKt36188() throws Exception {
                 runTest("compiler/testData/codegen/box/defaultArguments/function/kt36188.kt");