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 11a5f5063a5..3d687ed9b0c 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
@@ -27339,6 +27339,12 @@ public class DiagnosticCompilerTestFE10TestdataTestGenerated extends AbstractDia
                     KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/resolve/priority"), Pattern.compile("^(.+)\\.kt$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), true, "multiplatform");
                 }
 
+                @Test
+                @TestMetadata("extensionVsMember.kt")
+                public void testExtensionVsMember() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt");
+                }
+
                 @Test
                 @TestMetadata("invokeExtensionVsOther.kt")
                 public void testInvokeExtensionVsOther() throws Exception {
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 58181292055..ed1ab16824f 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
@@ -27339,6 +27339,12 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated
                     KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/resolve/priority"), Pattern.compile("^(.+)\\.kt$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), true, "multiplatform");
                 }
 
+                @Test
+                @TestMetadata("extensionVsMember.kt")
+                public void testExtensionVsMember() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt");
+                }
+
                 @Test
                 @TestMetadata("invokeExtensionVsOther.kt")
                 public void testInvokeExtensionVsOther() throws Exception {
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 d5b4085f78a..e86765bf67d 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
@@ -27339,6 +27339,12 @@ public class FirLightTreeOldFrontendDiagnosticsTestGenerated extends AbstractFir
                     KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/resolve/priority"), Pattern.compile("^(.+)\\.kt$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), true, "multiplatform");
                 }
 
+                @Test
+                @TestMetadata("extensionVsMember.kt")
+                public void testExtensionVsMember() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt");
+                }
+
                 @Test
                 @TestMetadata("invokeExtensionVsOther.kt")
                 public void testInvokeExtensionVsOther() throws Exception {
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 5eda00f629f..b15d2b12006 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
@@ -27351,6 +27351,12 @@ public class FirPsiOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiDia
                     KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/resolve/priority"), Pattern.compile("^(.*)\\.kts?$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), true, "multiplatform");
                 }
 
+                @Test
+                @TestMetadata("extensionVsMember.kt")
+                public void testExtensionVsMember() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt");
+                }
+
                 @Test
                 @TestMetadata("invokeExtensionVsOther.kt")
                 public void testInvokeExtensionVsOther() throws Exception {
diff --git a/compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt b/compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt
new file mode 100644
index 00000000000..b96c18da271
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt
@@ -0,0 +1,11 @@
+// FIR_IDENTICAL
+// ISSUE: KT-57968
+
+class Some(val child: Some?)
+
+val Some.foo get(): Int =
+    if ((child?.foo ?: 0) > 1) {
+        0
+    } else {
+        1
+    }
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 81d5c305018..25491cb1086 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
@@ -28123,6 +28123,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                     KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/resolve/priority"), Pattern.compile("^(.*)\\.kts?$"), Pattern.compile("^(.+)\\.(reversed|fir|ll)\\.kts?$"), true);
                 }
 
+                @Test
+                @TestMetadata("extensionVsMember.kt")
+                public void testExtensionVsMember() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/resolve/priority/extensionVsMember.kt");
+                }
+
                 @Test
                 @TestMetadata("invokeExtensionVsOther.kt")
                 public void testInvokeExtensionVsOther() throws Exception {