diff --git a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/ir/Fir2IrTextTestGenerated.java b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/ir/Fir2IrTextTestGenerated.java
index 93c605c1cbd..1884145e889 100644
--- a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/ir/Fir2IrTextTestGenerated.java
+++ b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/ir/Fir2IrTextTestGenerated.java
@@ -88,24 +88,6 @@ public class Fir2IrTextTestGenerated extends AbstractFir2IrTextTest {
             runTest("compiler/testData/ir/irText/classes/companionObject.kt");
         }
 
-        @Test
-        @TestMetadata("dataClassWithArrayMembers.kt")
-        public void testDataClassWithArrayMembers() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/dataClassWithArrayMembers.kt");
-        }
-
-        @Test
-        @TestMetadata("dataClasses.kt")
-        public void testDataClasses() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/dataClasses.kt");
-        }
-
-        @Test
-        @TestMetadata("dataClassesGeneric.kt")
-        public void testDataClassesGeneric() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/dataClassesGeneric.kt");
-        }
-
         @Test
         @TestMetadata("delegatedGenericImplementation.kt")
         public void testDelegatedGenericImplementation() throws Exception {
@@ -232,12 +214,6 @@ public class Fir2IrTextTestGenerated extends AbstractFir2IrTextTest {
             runTest("compiler/testData/ir/irText/classes/kt19306.kt");
         }
 
-        @Test
-        @TestMetadata("kt31649.kt")
-        public void testKt31649() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/kt31649.kt");
-        }
-
         @Test
         @TestMetadata("kt43217.kt")
         public void testKt43217() throws Exception {
@@ -262,12 +238,6 @@ public class Fir2IrTextTestGenerated extends AbstractFir2IrTextTest {
             runTest("compiler/testData/ir/irText/classes/kt45934.kt");
         }
 
-        @Test
-        @TestMetadata("lambdaInDataClassDefaultParameter.kt")
-        public void testLambdaInDataClassDefaultParameter() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.kt");
-        }
-
         @Test
         @TestMetadata("localClasses.kt")
         public void testLocalClasses() throws Exception {
@@ -286,12 +256,6 @@ public class Fir2IrTextTestGenerated extends AbstractFir2IrTextTest {
             runTest("compiler/testData/ir/irText/classes/objectWithInitializers.kt");
         }
 
-        @Test
-        @TestMetadata("openDataClass.kt")
-        public void testOpenDataClass() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/openDataClass.kt");
-        }
-
         @Test
         @TestMetadata("outerClassAccess.kt")
         public void testOuterClassAccess() throws Exception {
@@ -345,6 +309,52 @@ public class Fir2IrTextTestGenerated extends AbstractFir2IrTextTest {
         public void testSuperCallsComposed() throws Exception {
             runTest("compiler/testData/ir/irText/classes/superCallsComposed.kt");
         }
+
+        @Nested
+        @TestMetadata("compiler/testData/ir/irText/classes/dataClasses")
+        @TestDataPath("$PROJECT_ROOT")
+        public class DataClasses {
+            @Test
+            public void testAllFilesPresentInDataClasses() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/ir/irText/classes/dataClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+
+            @Test
+            @TestMetadata("dataClassWithArrayMembers.kt")
+            public void testDataClassWithArrayMembers() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.kt");
+            }
+
+            @Test
+            @TestMetadata("dataClasses.kt")
+            public void testDataClasses() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/dataClasses.kt");
+            }
+
+            @Test
+            @TestMetadata("dataClassesGeneric.kt")
+            public void testDataClassesGeneric() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.kt");
+            }
+
+            @Test
+            @TestMetadata("kt31649.kt")
+            public void testKt31649() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/kt31649.kt");
+            }
+
+            @Test
+            @TestMetadata("lambdaInDataClassDefaultParameter.kt")
+            public void testLambdaInDataClassDefaultParameter() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.kt");
+            }
+
+            @Test
+            @TestMetadata("openDataClass.kt")
+            public void testOpenDataClass() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/openDataClass.kt");
+            }
+        }
     }
 
     @Nested
diff --git a/compiler/testData/ir/irText/classes/dataClassWithArrayMembers.fir.ir.txt b/compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.fir.ir.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClassWithArrayMembers.fir.ir.txt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.fir.ir.txt
diff --git a/compiler/testData/ir/irText/classes/dataClassWithArrayMembers.fir.kt.txt b/compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.fir.kt.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClassWithArrayMembers.fir.kt.txt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.fir.kt.txt
diff --git a/compiler/testData/ir/irText/classes/dataClassWithArrayMembers.ir.txt b/compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.ir.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClassWithArrayMembers.ir.txt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.ir.txt
diff --git a/compiler/testData/ir/irText/classes/dataClassWithArrayMembers.kt b/compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.kt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClassWithArrayMembers.kt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.kt
diff --git a/compiler/testData/ir/irText/classes/dataClassWithArrayMembers.kt.txt b/compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.kt.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClassWithArrayMembers.kt.txt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.kt.txt
diff --git a/compiler/testData/ir/irText/classes/dataClasses.fir.ir.txt b/compiler/testData/ir/irText/classes/dataClasses/dataClasses.fir.ir.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClasses.fir.ir.txt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClasses.fir.ir.txt
diff --git a/compiler/testData/ir/irText/classes/dataClasses.fir.kt.txt b/compiler/testData/ir/irText/classes/dataClasses/dataClasses.fir.kt.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClasses.fir.kt.txt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClasses.fir.kt.txt
diff --git a/compiler/testData/ir/irText/classes/dataClasses.ir.txt b/compiler/testData/ir/irText/classes/dataClasses/dataClasses.ir.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClasses.ir.txt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClasses.ir.txt
diff --git a/compiler/testData/ir/irText/classes/dataClasses.kt b/compiler/testData/ir/irText/classes/dataClasses/dataClasses.kt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClasses.kt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClasses.kt
diff --git a/compiler/testData/ir/irText/classes/dataClasses.kt.txt b/compiler/testData/ir/irText/classes/dataClasses/dataClasses.kt.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClasses.kt.txt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClasses.kt.txt
diff --git a/compiler/testData/ir/irText/classes/dataClassesGeneric.fir.ir.txt b/compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.fir.ir.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClassesGeneric.fir.ir.txt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.fir.ir.txt
diff --git a/compiler/testData/ir/irText/classes/dataClassesGeneric.fir.kt.txt b/compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.fir.kt.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClassesGeneric.fir.kt.txt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.fir.kt.txt
diff --git a/compiler/testData/ir/irText/classes/dataClassesGeneric.ir.txt b/compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.ir.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClassesGeneric.ir.txt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.ir.txt
diff --git a/compiler/testData/ir/irText/classes/dataClassesGeneric.kt b/compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.kt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClassesGeneric.kt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.kt
diff --git a/compiler/testData/ir/irText/classes/dataClassesGeneric.kt.txt b/compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.kt.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/dataClassesGeneric.kt.txt
rename to compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.kt.txt
diff --git a/compiler/testData/ir/irText/classes/kt31649.fir.ir.txt b/compiler/testData/ir/irText/classes/dataClasses/kt31649.fir.ir.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/kt31649.fir.ir.txt
rename to compiler/testData/ir/irText/classes/dataClasses/kt31649.fir.ir.txt
diff --git a/compiler/testData/ir/irText/classes/kt31649.fir.kt.txt b/compiler/testData/ir/irText/classes/dataClasses/kt31649.fir.kt.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/kt31649.fir.kt.txt
rename to compiler/testData/ir/irText/classes/dataClasses/kt31649.fir.kt.txt
diff --git a/compiler/testData/ir/irText/classes/kt31649.ir.txt b/compiler/testData/ir/irText/classes/dataClasses/kt31649.ir.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/kt31649.ir.txt
rename to compiler/testData/ir/irText/classes/dataClasses/kt31649.ir.txt
diff --git a/compiler/testData/ir/irText/classes/kt31649.kt b/compiler/testData/ir/irText/classes/dataClasses/kt31649.kt
similarity index 100%
rename from compiler/testData/ir/irText/classes/kt31649.kt
rename to compiler/testData/ir/irText/classes/dataClasses/kt31649.kt
diff --git a/compiler/testData/ir/irText/classes/kt31649.kt.txt b/compiler/testData/ir/irText/classes/dataClasses/kt31649.kt.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/kt31649.kt.txt
rename to compiler/testData/ir/irText/classes/dataClasses/kt31649.kt.txt
diff --git a/compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.fir.ir.txt b/compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.fir.ir.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.fir.ir.txt
rename to compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.fir.ir.txt
diff --git a/compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.fir.kt.txt b/compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.fir.kt.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.fir.kt.txt
rename to compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.fir.kt.txt
diff --git a/compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.ir.txt b/compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.ir.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.ir.txt
rename to compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.ir.txt
diff --git a/compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.kt b/compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.kt
similarity index 100%
rename from compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.kt
rename to compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.kt
diff --git a/compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.kt.txt b/compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.kt.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.kt.txt
rename to compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.kt.txt
diff --git a/compiler/testData/ir/irText/classes/openDataClass.fir.ir.txt b/compiler/testData/ir/irText/classes/dataClasses/openDataClass.fir.ir.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/openDataClass.fir.ir.txt
rename to compiler/testData/ir/irText/classes/dataClasses/openDataClass.fir.ir.txt
diff --git a/compiler/testData/ir/irText/classes/openDataClass.fir.kt.txt b/compiler/testData/ir/irText/classes/dataClasses/openDataClass.fir.kt.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/openDataClass.fir.kt.txt
rename to compiler/testData/ir/irText/classes/dataClasses/openDataClass.fir.kt.txt
diff --git a/compiler/testData/ir/irText/classes/openDataClass.ir.txt b/compiler/testData/ir/irText/classes/dataClasses/openDataClass.ir.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/openDataClass.ir.txt
rename to compiler/testData/ir/irText/classes/dataClasses/openDataClass.ir.txt
diff --git a/compiler/testData/ir/irText/classes/openDataClass.kt b/compiler/testData/ir/irText/classes/dataClasses/openDataClass.kt
similarity index 100%
rename from compiler/testData/ir/irText/classes/openDataClass.kt
rename to compiler/testData/ir/irText/classes/dataClasses/openDataClass.kt
diff --git a/compiler/testData/ir/irText/classes/openDataClass.kt.txt b/compiler/testData/ir/irText/classes/dataClasses/openDataClass.kt.txt
similarity index 100%
rename from compiler/testData/ir/irText/classes/openDataClass.kt.txt
rename to compiler/testData/ir/irText/classes/dataClasses/openDataClass.kt.txt
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/ir/IrTextTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/ir/IrTextTestGenerated.java
index 21172c979ff..795774713e7 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/ir/IrTextTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/ir/IrTextTestGenerated.java
@@ -88,24 +88,6 @@ public class IrTextTestGenerated extends AbstractIrTextTest {
             runTest("compiler/testData/ir/irText/classes/companionObject.kt");
         }
 
-        @Test
-        @TestMetadata("dataClassWithArrayMembers.kt")
-        public void testDataClassWithArrayMembers() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/dataClassWithArrayMembers.kt");
-        }
-
-        @Test
-        @TestMetadata("dataClasses.kt")
-        public void testDataClasses() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/dataClasses.kt");
-        }
-
-        @Test
-        @TestMetadata("dataClassesGeneric.kt")
-        public void testDataClassesGeneric() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/dataClassesGeneric.kt");
-        }
-
         @Test
         @TestMetadata("delegatedGenericImplementation.kt")
         public void testDelegatedGenericImplementation() throws Exception {
@@ -232,12 +214,6 @@ public class IrTextTestGenerated extends AbstractIrTextTest {
             runTest("compiler/testData/ir/irText/classes/kt19306.kt");
         }
 
-        @Test
-        @TestMetadata("kt31649.kt")
-        public void testKt31649() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/kt31649.kt");
-        }
-
         @Test
         @TestMetadata("kt43217.kt")
         public void testKt43217() throws Exception {
@@ -262,12 +238,6 @@ public class IrTextTestGenerated extends AbstractIrTextTest {
             runTest("compiler/testData/ir/irText/classes/kt45934.kt");
         }
 
-        @Test
-        @TestMetadata("lambdaInDataClassDefaultParameter.kt")
-        public void testLambdaInDataClassDefaultParameter() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.kt");
-        }
-
         @Test
         @TestMetadata("localClasses.kt")
         public void testLocalClasses() throws Exception {
@@ -286,12 +256,6 @@ public class IrTextTestGenerated extends AbstractIrTextTest {
             runTest("compiler/testData/ir/irText/classes/objectWithInitializers.kt");
         }
 
-        @Test
-        @TestMetadata("openDataClass.kt")
-        public void testOpenDataClass() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/openDataClass.kt");
-        }
-
         @Test
         @TestMetadata("outerClassAccess.kt")
         public void testOuterClassAccess() throws Exception {
@@ -345,6 +309,52 @@ public class IrTextTestGenerated extends AbstractIrTextTest {
         public void testSuperCallsComposed() throws Exception {
             runTest("compiler/testData/ir/irText/classes/superCallsComposed.kt");
         }
+
+        @Nested
+        @TestMetadata("compiler/testData/ir/irText/classes/dataClasses")
+        @TestDataPath("$PROJECT_ROOT")
+        public class DataClasses {
+            @Test
+            public void testAllFilesPresentInDataClasses() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/ir/irText/classes/dataClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
+            }
+
+            @Test
+            @TestMetadata("dataClassWithArrayMembers.kt")
+            public void testDataClassWithArrayMembers() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.kt");
+            }
+
+            @Test
+            @TestMetadata("dataClasses.kt")
+            public void testDataClasses() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/dataClasses.kt");
+            }
+
+            @Test
+            @TestMetadata("dataClassesGeneric.kt")
+            public void testDataClassesGeneric() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.kt");
+            }
+
+            @Test
+            @TestMetadata("kt31649.kt")
+            public void testKt31649() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/kt31649.kt");
+            }
+
+            @Test
+            @TestMetadata("lambdaInDataClassDefaultParameter.kt")
+            public void testLambdaInDataClassDefaultParameter() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.kt");
+            }
+
+            @Test
+            @TestMetadata("openDataClass.kt")
+            public void testOpenDataClass() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/openDataClass.kt");
+            }
+        }
     }
 
     @Nested
diff --git a/compiler/tests-gen/org/jetbrains/kotlin/ir/KlibTextTestCaseGenerated.java b/compiler/tests-gen/org/jetbrains/kotlin/ir/KlibTextTestCaseGenerated.java
index 8593f8983b9..22a5e57771b 100644
--- a/compiler/tests-gen/org/jetbrains/kotlin/ir/KlibTextTestCaseGenerated.java
+++ b/compiler/tests-gen/org/jetbrains/kotlin/ir/KlibTextTestCaseGenerated.java
@@ -87,21 +87,6 @@ public class KlibTextTestCaseGenerated extends AbstractKlibTextTestCase {
             runTest("compiler/testData/ir/irText/classes/companionObject.kt");
         }
 
-        @TestMetadata("dataClassWithArrayMembers.kt")
-        public void testDataClassWithArrayMembers() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/dataClassWithArrayMembers.kt");
-        }
-
-        @TestMetadata("dataClasses.kt")
-        public void testDataClasses() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/dataClasses.kt");
-        }
-
-        @TestMetadata("dataClassesGeneric.kt")
-        public void testDataClassesGeneric() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/dataClassesGeneric.kt");
-        }
-
         @TestMetadata("delegatedGenericImplementation.kt")
         public void testDelegatedGenericImplementation() throws Exception {
             runTest("compiler/testData/ir/irText/classes/delegatedGenericImplementation.kt");
@@ -192,16 +177,6 @@ public class KlibTextTestCaseGenerated extends AbstractKlibTextTestCase {
             runTest("compiler/testData/ir/irText/classes/kt19306.kt");
         }
 
-        @TestMetadata("kt31649.kt")
-        public void testKt31649() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/kt31649.kt");
-        }
-
-        @TestMetadata("lambdaInDataClassDefaultParameter.kt")
-        public void testLambdaInDataClassDefaultParameter() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/lambdaInDataClassDefaultParameter.kt");
-        }
-
         @TestMetadata("localClasses.kt")
         public void testLocalClasses() throws Exception {
             runTest("compiler/testData/ir/irText/classes/localClasses.kt");
@@ -217,11 +192,6 @@ public class KlibTextTestCaseGenerated extends AbstractKlibTextTestCase {
             runTest("compiler/testData/ir/irText/classes/objectWithInitializers.kt");
         }
 
-        @TestMetadata("openDataClass.kt")
-        public void testOpenDataClass() throws Exception {
-            runTest("compiler/testData/ir/irText/classes/openDataClass.kt");
-        }
-
         @TestMetadata("outerClassAccess.kt")
         public void testOuterClassAccess() throws Exception {
             runTest("compiler/testData/ir/irText/classes/outerClassAccess.kt");
@@ -266,6 +236,49 @@ public class KlibTextTestCaseGenerated extends AbstractKlibTextTestCase {
         public void testSuperCallsComposed() throws Exception {
             runTest("compiler/testData/ir/irText/classes/superCallsComposed.kt");
         }
+
+        @TestMetadata("compiler/testData/ir/irText/classes/dataClasses")
+        @TestDataPath("$PROJECT_ROOT")
+        @RunWith(JUnit3RunnerWithInners.class)
+        public static class DataClasses extends AbstractKlibTextTestCase {
+            private void runTest(String testDataFilePath) throws Exception {
+                KotlinTestUtils.runTest(this::doTest, TargetBackend.JS_IR, testDataFilePath);
+            }
+
+            public void testAllFilesPresentInDataClasses() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/ir/irText/classes/dataClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR, true);
+            }
+
+            @TestMetadata("dataClassWithArrayMembers.kt")
+            public void testDataClassWithArrayMembers() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.kt");
+            }
+
+            @TestMetadata("dataClasses.kt")
+            public void testDataClasses() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/dataClasses.kt");
+            }
+
+            @TestMetadata("dataClassesGeneric.kt")
+            public void testDataClassesGeneric() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.kt");
+            }
+
+            @TestMetadata("kt31649.kt")
+            public void testKt31649() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/kt31649.kt");
+            }
+
+            @TestMetadata("lambdaInDataClassDefaultParameter.kt")
+            public void testLambdaInDataClassDefaultParameter() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.kt");
+            }
+
+            @TestMetadata("openDataClass.kt")
+            public void testOpenDataClass() throws Exception {
+                runTest("compiler/testData/ir/irText/classes/dataClasses/openDataClass.kt");
+            }
+        }
     }
 
     @TestMetadata("compiler/testData/ir/irText/declarations")