diff --git a/compiler/testData/diagnostics/tests/controlFlowAnalysis/assignmentInLocalsInConstructor.kt b/compiler/testData/diagnostics/tests/controlFlowAnalysis/assignmentInLocalsInConstructor.kt
new file mode 100644
index 00000000000..029570b0ff6
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/controlFlowAnalysis/assignmentInLocalsInConstructor.kt
@@ -0,0 +1,48 @@
+// Tests for KT-13597 (val assignment inside local object in constructor)
+
+class Test {
+    val a: String
+
+    init {
+        val t = object {
+            fun some() {
+                // See KT-13597
+                a = "12"
+            }
+        }
+
+        a = "2"
+        t.some()
+    }
+}
+
+class Test2 {
+    init {
+        val t = object {
+            fun some() {
+                <!VAL_REASSIGNMENT!>a<!> = "12"
+            }
+        }
+
+        <!INITIALIZATION_BEFORE_DECLARATION!>a<!> = "2"
+        t.some()
+    }
+
+    val a: String
+}
+
+// Tests for KT-14381 (val assignment inside lambda in constructor)
+
+fun <T> exec(f: () -> T): T = f()
+
+class Test4 {
+    val a: String
+
+    init {
+        exec {
+            // See KT-14381
+            a = "12"
+        }
+        a = "34"
+    }
+}
diff --git a/compiler/testData/diagnostics/tests/controlFlowAnalysis/assignmentInLocalsInConstructor.txt b/compiler/testData/diagnostics/tests/controlFlowAnalysis/assignmentInLocalsInConstructor.txt
new file mode 100644
index 00000000000..52fe0a0df9a
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/controlFlowAnalysis/assignmentInLocalsInConstructor.txt
@@ -0,0 +1,27 @@
+package
+
+public fun </*0*/ T> exec(/*0*/ f: () -> T): T
+
+public final class Test {
+    public constructor Test()
+    public final val a: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Test2 {
+    public constructor Test2()
+    public final val a: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Test4 {
+    public constructor Test4()
+    public final val a: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
diff --git a/compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java
index a5d3e721156..0e0f5855289 100644
--- a/compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java
@@ -3670,6 +3670,12 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                 doTest(fileName);
             }
 
+            @TestMetadata("assignmentInLocalsInConstructor.kt")
+            public void testAssignmentInLocalsInConstructor() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/controlFlowAnalysis/assignmentInLocalsInConstructor.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("backingFieldInsideGetter.kt")
             public void testBackingFieldInsideGetter() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/controlFlowAnalysis/backingFieldInsideGetter.kt");