diff --git a/compiler/testData/codegen/box/localClasses/nameWithWhitespace.kt b/compiler/testData/codegen/box/localClasses/nameWithWhitespace.kt
new file mode 100644
index 00000000000..099c1510b71
--- /dev/null
+++ b/compiler/testData/codegen/box/localClasses/nameWithWhitespace.kt
@@ -0,0 +1,8 @@
+// IGNORE_BACKEND: JS
+
+fun `method with spaces`(): String {
+    data class C(val s: String = "OK")
+    return C().s
+}
+
+fun box(): String = `method with spaces`()
diff --git a/compiler/tests-ir-jvm/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java b/compiler/tests-ir-jvm/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
index b3c0e0234d4..60fd5c3f801 100644
--- a/compiler/tests-ir-jvm/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
+++ b/compiler/tests-ir-jvm/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
@@ -11625,6 +11625,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             doTest(fileName);
         }
 
+        @TestMetadata("nameWithWhitespace.kt")
+        public void testNameWithWhitespace() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/localClasses/nameWithWhitespace.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("noclosure.kt")
         public void testNoclosure() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/localClasses/noclosure.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
index 9df6d6323b6..eac7ed920a3 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
@@ -11625,6 +11625,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             doTest(fileName);
         }
 
+        @TestMetadata("nameWithWhitespace.kt")
+        public void testNameWithWhitespace() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/localClasses/nameWithWhitespace.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("noclosure.kt")
         public void testNoclosure() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/localClasses/noclosure.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
index 2089d6a04a4..0f1b06c27e2 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
@@ -11637,6 +11637,12 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             doTest(fileName);
         }
 
+        @TestMetadata("nameWithWhitespace.kt")
+        public void testNameWithWhitespace() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/localClasses/nameWithWhitespace.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("noclosure.kt")
         public void testNoclosure() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/localClasses/noclosure.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 7c8748f5d2c..3aec3282254 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
@@ -12837,6 +12837,18 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             doTest(fileName);
         }
 
+        @TestMetadata("nameWithWhitespace.kt")
+        public void testNameWithWhitespace() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/localClasses/nameWithWhitespace.kt");
+            try {
+                doTest(fileName);
+            }
+            catch (Throwable ignore) {
+                return;
+            }
+            throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+        }
+
         @TestMetadata("noclosure.kt")
         public void testNoclosure() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/localClasses/noclosure.kt");