diff --git a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java
index f660d127c24..714c84c2e07 100644
--- a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java
+++ b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java
@@ -10409,6 +10409,12 @@ public class DiagnosisCompilerTestFE10TestdataTestGenerated extends AbstractDiag
                     runTest("compiler/testData/diagnostics/tests/enum/entries/entriesPropertyWithJvmStaticClash.kt");
                 }
 
+                @Test
+                @TestMetadata("entriesUnsupported.kt")
+                public void testEntriesUnsupported() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.kt");
+                }
+
                 @Test
                 @TestMetadata("enumEntriesAmbiguity.kt")
                 public void testEnumEntriesAmbiguity() throws Exception {
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java
index 8299dcafca4..00580c4f84c 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java
@@ -10415,6 +10415,12 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirDiagnosti
                     runTest("compiler/testData/diagnostics/tests/enum/entries/entriesPropertyWithJvmStaticClash.kt");
                 }
 
+                @Test
+                @TestMetadata("entriesUnsupported.kt")
+                public void testEntriesUnsupported() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.kt");
+                }
+
                 @Test
                 @TestMetadata("enumEntriesAmbiguity.kt")
                 public void testEnumEntriesAmbiguity() throws Exception {
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsWithLightTreeTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsWithLightTreeTestGenerated.java
index f0ffe45317c..80c0cde476c 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsWithLightTreeTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsWithLightTreeTestGenerated.java
@@ -10409,6 +10409,12 @@ public class FirOldFrontendDiagnosticsWithLightTreeTestGenerated extends Abstrac
                     runTest("compiler/testData/diagnostics/tests/enum/entries/entriesPropertyWithJvmStaticClash.kt");
                 }
 
+                @Test
+                @TestMetadata("entriesUnsupported.kt")
+                public void testEntriesUnsupported() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.kt");
+                }
+
                 @Test
                 @TestMetadata("enumEntriesAmbiguity.kt")
                 public void testEnumEntriesAmbiguity() throws Exception {
diff --git a/compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.fir.kt b/compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.fir.kt
new file mode 100644
index 00000000000..f653f235035
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.fir.kt
@@ -0,0 +1,11 @@
+// !LANGUAGE: -EnumEntries
+// WITH_STDLIB
+// ISSUE: KT-55251
+
+enum class Foo {
+    BAR;
+}
+
+fun main() {
+    Foo.<!OPT_IN_USAGE_ERROR!>entries<!>
+}
diff --git a/compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.kt b/compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.kt
new file mode 100644
index 00000000000..836c7e0f3a3
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.kt
@@ -0,0 +1,11 @@
+// !LANGUAGE: -EnumEntries
+// WITH_STDLIB
+// ISSUE: KT-55251
+
+enum class Foo {
+    BAR;
+}
+
+fun main() {
+    Foo.<!UNRESOLVED_REFERENCE!>entries<!>
+}
diff --git a/compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.txt b/compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.txt
new file mode 100644
index 00000000000..83ba52c4b60
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.txt
@@ -0,0 +1,23 @@
+package
+
+public fun main(): kotlin.Unit
+
+public final enum class Foo : kotlin.Enum<Foo> {
+    enum entry BAR
+
+    private constructor Foo()
+    @kotlin.internal.IntrinsicConstEvaluation public final override /*1*/ /*fake_override*/ val name: kotlin.String
+    public final override /*1*/ /*fake_override*/ val ordinal: kotlin.Int
+    protected final override /*1*/ /*fake_override*/ fun clone(): kotlin.Any
+    public final override /*1*/ /*fake_override*/ fun compareTo(/*0*/ other: Foo): kotlin.Int
+    public final override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    protected/*protected and package*/ final override /*1*/ /*fake_override*/ /*isHiddenForResolutionEverywhereBesideSupercalls*/ fun finalize(): kotlin.Unit
+    public final override /*1*/ /*fake_override*/ /*isHiddenForResolutionEverywhereBesideSupercalls*/ fun getDeclaringClass(): java.lang.Class<Foo!>!
+    public final override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    // Static members
+    public final /*synthesized*/ val entries: kotlin.enums.EnumEntries<Foo>
+    public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): Foo
+    public final /*synthesized*/ fun values(): kotlin.Array<Foo>
+}
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 a522fdc8cbf..9107d76b778 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
@@ -10415,6 +10415,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                     runTest("compiler/testData/diagnostics/tests/enum/entries/entriesPropertyWithJvmStaticClash.kt");
                 }
 
+                @Test
+                @TestMetadata("entriesUnsupported.kt")
+                public void testEntriesUnsupported() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/enum/entries/entriesUnsupported.kt");
+                }
+
                 @Test
                 @TestMetadata("enumEntriesAmbiguity.kt")
                 public void testEnumEntriesAmbiguity() throws Exception {