diff --git a/compiler/testData/ir/irJsText/dynamic/implicitCastFromDynamic.kt b/compiler/testData/ir/irJsText/dynamic/implicitCastFromDynamic.kt
new file mode 100644
index 00000000000..7fbe04ab6cf
--- /dev/null
+++ b/compiler/testData/ir/irJsText/dynamic/implicitCastFromDynamic.kt
@@ -0,0 +1,11 @@
+val d: dynamic = 1
+
+val p: Int = d
+
+fun test1(d: dynamic): Int = d
+
+fun test2(d: dynamic): Any = d
+
+fun test3(d: dynamic): Any? = d
+
+fun test4(d: dynamic): String = d.member(1, 2, 3)
diff --git a/compiler/testData/ir/irJsText/dynamic/implicitCastFromDynamic.txt b/compiler/testData/ir/irJsText/dynamic/implicitCastFromDynamic.txt
new file mode 100644
index 00000000000..e960d9ab169
--- /dev/null
+++ b/compiler/testData/ir/irJsText/dynamic/implicitCastFromDynamic.txt
@@ -0,0 +1,48 @@
+FILE fqName:<root> fileName:/implicitCastFromDynamic.kt
+  PROPERTY name:d visibility:public modality:FINAL [val]
+    FIELD PROPERTY_BACKING_FIELD name:d type:dynamic visibility:public [final,static]
+      EXPRESSION_BODY
+        CONST Int type=kotlin.Int value=1
+    FUN DEFAULT_PROPERTY_ACCESSOR name:<get-d> visibility:public modality:FINAL <> () returnType:dynamic
+      correspondingProperty: PROPERTY name:d visibility:public modality:FINAL [val]
+      BLOCK_BODY
+        RETURN type=kotlin.Nothing from='public final fun <get-d> (): dynamic declared in <root>'
+          GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:d type:dynamic visibility:public [final,static] ' type=dynamic origin=null
+  PROPERTY name:p visibility:public modality:FINAL [val]
+    FIELD PROPERTY_BACKING_FIELD name:p type:kotlin.Int visibility:public [final,static]
+      EXPRESSION_BODY
+        TYPE_OP type=kotlin.Int origin=IMPLICIT_CAST typeOperand=kotlin.Int
+          CALL 'public final fun <get-d> (): dynamic declared in <root>' type=dynamic origin=GET_PROPERTY
+    FUN DEFAULT_PROPERTY_ACCESSOR name:<get-p> visibility:public modality:FINAL <> () returnType:kotlin.Int
+      correspondingProperty: PROPERTY name:p visibility:public modality:FINAL [val]
+      BLOCK_BODY
+        RETURN type=kotlin.Nothing from='public final fun <get-p> (): kotlin.Int declared in <root>'
+          GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:p type:kotlin.Int visibility:public [final,static] ' type=kotlin.Int origin=null
+  FUN name:test1 visibility:public modality:FINAL <> (d:dynamic) returnType:kotlin.Int
+    VALUE_PARAMETER name:d index:0 type:dynamic
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='public final fun test1 (d: dynamic): kotlin.Int declared in <root>'
+        TYPE_OP type=kotlin.Int origin=IMPLICIT_CAST typeOperand=kotlin.Int
+          GET_VAR 'd: dynamic declared in <root>.test1' type=dynamic origin=null
+  FUN name:test2 visibility:public modality:FINAL <> (d:dynamic) returnType:kotlin.Any
+    VALUE_PARAMETER name:d index:0 type:dynamic
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='public final fun test2 (d: dynamic): kotlin.Any declared in <root>'
+        TYPE_OP type=kotlin.Any origin=IMPLICIT_CAST typeOperand=kotlin.Any
+          GET_VAR 'd: dynamic declared in <root>.test2' type=dynamic origin=null
+  FUN name:test3 visibility:public modality:FINAL <> (d:dynamic) returnType:kotlin.Any?
+    VALUE_PARAMETER name:d index:0 type:dynamic
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='public final fun test3 (d: dynamic): kotlin.Any? declared in <root>'
+        GET_VAR 'd: dynamic declared in <root>.test3' type=dynamic origin=null
+  FUN name:test4 visibility:public modality:FINAL <> (d:dynamic) returnType:kotlin.String
+    VALUE_PARAMETER name:d index:0 type:dynamic
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='public final fun test4 (d: dynamic): kotlin.String declared in <root>'
+        TYPE_OP type=kotlin.String origin=IMPLICIT_CAST typeOperand=kotlin.String
+          DYN_OP operator=INVOKE type=dynamic
+            receiver: DYN_MEMBER memberName='member' type=dynamic
+              GET_VAR 'd: dynamic declared in <root>.test4' type=dynamic origin=null
+            0: CONST Int type=kotlin.Int value=1
+            1: CONST Int type=kotlin.Int value=2
+            2: CONST Int type=kotlin.Int value=3
diff --git a/compiler/testData/ir/irJsText/dynamic/implicitCastToDynamic.kt b/compiler/testData/ir/irJsText/dynamic/implicitCastToDynamic.kt
new file mode 100644
index 00000000000..3667ad016a1
--- /dev/null
+++ b/compiler/testData/ir/irJsText/dynamic/implicitCastToDynamic.kt
@@ -0,0 +1,32 @@
+val d1: dynamic = 1
+
+val p: Int = 1
+
+var d2: dynamic = p
+
+fun withDynamic(d: dynamic) = d
+
+fun test1(s: String) {
+    withDynamic(s)
+}
+
+fun test2(a: Any) {
+    val d: dynamic = a
+}
+
+fun test3(a: Any?) {
+    val d: dynamic = a
+}
+
+fun test4(a: Any, s: String, na: Any?) {
+    var d: dynamic = p
+    d = a
+    d = na
+    d = s
+}
+
+fun test5(a: Any, s: String, na: Any?) {
+    d2 = a
+    d2 = na
+    d2 = s
+}
diff --git a/compiler/testData/ir/irJsText/dynamic/implicitCastToDynamic.txt b/compiler/testData/ir/irJsText/dynamic/implicitCastToDynamic.txt
new file mode 100644
index 00000000000..9ed64e65593
--- /dev/null
+++ b/compiler/testData/ir/irJsText/dynamic/implicitCastToDynamic.txt
@@ -0,0 +1,78 @@
+FILE fqName:<root> fileName:/implicitCastToDynamic.kt
+  PROPERTY name:d1 visibility:public modality:FINAL [val]
+    FIELD PROPERTY_BACKING_FIELD name:d1 type:dynamic visibility:public [final,static]
+      EXPRESSION_BODY
+        CONST Int type=kotlin.Int value=1
+    FUN DEFAULT_PROPERTY_ACCESSOR name:<get-d1> visibility:public modality:FINAL <> () returnType:dynamic
+      correspondingProperty: PROPERTY name:d1 visibility:public modality:FINAL [val]
+      BLOCK_BODY
+        RETURN type=kotlin.Nothing from='public final fun <get-d1> (): dynamic declared in <root>'
+          GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:d1 type:dynamic visibility:public [final,static] ' type=dynamic origin=null
+  PROPERTY name:p visibility:public modality:FINAL [val]
+    FIELD PROPERTY_BACKING_FIELD name:p type:kotlin.Int visibility:public [final,static]
+      EXPRESSION_BODY
+        CONST Int type=kotlin.Int value=1
+    FUN DEFAULT_PROPERTY_ACCESSOR name:<get-p> visibility:public modality:FINAL <> () returnType:kotlin.Int
+      correspondingProperty: PROPERTY name:p visibility:public modality:FINAL [val]
+      BLOCK_BODY
+        RETURN type=kotlin.Nothing from='public final fun <get-p> (): kotlin.Int declared in <root>'
+          GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:p type:kotlin.Int visibility:public [final,static] ' type=kotlin.Int origin=null
+  PROPERTY name:d2 visibility:public modality:FINAL [var]
+    FIELD PROPERTY_BACKING_FIELD name:d2 type:dynamic visibility:public [static]
+      EXPRESSION_BODY
+        CALL 'public final fun <get-p> (): kotlin.Int declared in <root>' type=kotlin.Int origin=GET_PROPERTY
+    FUN DEFAULT_PROPERTY_ACCESSOR name:<get-d2> visibility:public modality:FINAL <> () returnType:dynamic
+      correspondingProperty: PROPERTY name:d2 visibility:public modality:FINAL [var]
+      BLOCK_BODY
+        RETURN type=kotlin.Nothing from='public final fun <get-d2> (): dynamic declared in <root>'
+          GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:d2 type:dynamic visibility:public [static] ' type=dynamic origin=null
+    FUN DEFAULT_PROPERTY_ACCESSOR name:<set-d2> visibility:public modality:FINAL <> (<set-?>:dynamic) returnType:kotlin.Unit
+      correspondingProperty: PROPERTY name:d2 visibility:public modality:FINAL [var]
+      VALUE_PARAMETER name:<set-?> index:0 type:dynamic
+      BLOCK_BODY
+        SET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:d2 type:dynamic visibility:public [static] ' type=kotlin.Unit origin=null
+          value: GET_VAR '<set-?>: dynamic declared in <root>.<set-d2>' type=dynamic origin=null
+  FUN name:withDynamic visibility:public modality:FINAL <> (d:dynamic) returnType:dynamic
+    VALUE_PARAMETER name:d index:0 type:dynamic
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='public final fun withDynamic (d: dynamic): dynamic declared in <root>'
+        GET_VAR 'd: dynamic declared in <root>.withDynamic' type=dynamic origin=null
+  FUN name:test1 visibility:public modality:FINAL <> (s:kotlin.String) returnType:kotlin.Unit
+    VALUE_PARAMETER name:s index:0 type:kotlin.String
+    BLOCK_BODY
+      CALL 'public final fun withDynamic (d: dynamic): dynamic declared in <root>' type=dynamic origin=null
+        d: GET_VAR 's: kotlin.String declared in <root>.test1' type=kotlin.String origin=null
+  FUN name:test2 visibility:public modality:FINAL <> (a:kotlin.Any) returnType:kotlin.Unit
+    VALUE_PARAMETER name:a index:0 type:kotlin.Any
+    BLOCK_BODY
+      VAR name:d type:dynamic [val]
+        GET_VAR 'a: kotlin.Any declared in <root>.test2' type=kotlin.Any origin=null
+  FUN name:test3 visibility:public modality:FINAL <> (a:kotlin.Any?) returnType:kotlin.Unit
+    VALUE_PARAMETER name:a index:0 type:kotlin.Any?
+    BLOCK_BODY
+      VAR name:d type:dynamic [val]
+        GET_VAR 'a: kotlin.Any? declared in <root>.test3' type=kotlin.Any? origin=null
+  FUN name:test4 visibility:public modality:FINAL <> (a:kotlin.Any, s:kotlin.String, na:kotlin.Any?) returnType:kotlin.Unit
+    VALUE_PARAMETER name:a index:0 type:kotlin.Any
+    VALUE_PARAMETER name:s index:1 type:kotlin.String
+    VALUE_PARAMETER name:na index:2 type:kotlin.Any?
+    BLOCK_BODY
+      VAR name:d type:dynamic [var]
+        CALL 'public final fun <get-p> (): kotlin.Int declared in <root>' type=kotlin.Int origin=GET_PROPERTY
+      SET_VAR 'var d: dynamic [var] declared in <root>.test4' type=kotlin.Unit origin=EQ
+        GET_VAR 'a: kotlin.Any declared in <root>.test4' type=kotlin.Any origin=null
+      SET_VAR 'var d: dynamic [var] declared in <root>.test4' type=kotlin.Unit origin=EQ
+        GET_VAR 'na: kotlin.Any? declared in <root>.test4' type=kotlin.Any? origin=null
+      SET_VAR 'var d: dynamic [var] declared in <root>.test4' type=kotlin.Unit origin=EQ
+        GET_VAR 's: kotlin.String declared in <root>.test4' type=kotlin.String origin=null
+  FUN name:test5 visibility:public modality:FINAL <> (a:kotlin.Any, s:kotlin.String, na:kotlin.Any?) returnType:kotlin.Unit
+    VALUE_PARAMETER name:a index:0 type:kotlin.Any
+    VALUE_PARAMETER name:s index:1 type:kotlin.String
+    VALUE_PARAMETER name:na index:2 type:kotlin.Any?
+    BLOCK_BODY
+      CALL 'public final fun <set-d2> (<set-?>: dynamic): kotlin.Unit declared in <root>' type=kotlin.Unit origin=EQ
+        <set-?>: GET_VAR 'a: kotlin.Any declared in <root>.test5' type=kotlin.Any origin=null
+      CALL 'public final fun <set-d2> (<set-?>: dynamic): kotlin.Unit declared in <root>' type=kotlin.Unit origin=EQ
+        <set-?>: GET_VAR 'na: kotlin.Any? declared in <root>.test5' type=kotlin.Any? origin=null
+      CALL 'public final fun <set-d2> (<set-?>: dynamic): kotlin.Unit declared in <root>' type=kotlin.Unit origin=EQ
+        <set-?>: GET_VAR 's: kotlin.String declared in <root>.test5' type=kotlin.String origin=null
diff --git a/compiler/tests/org/jetbrains/kotlin/ir/IrJsTextTestCaseGenerated.java b/compiler/tests/org/jetbrains/kotlin/ir/IrJsTextTestCaseGenerated.java
index 0c8aba31743..0351b031819 100644
--- a/compiler/tests/org/jetbrains/kotlin/ir/IrJsTextTestCaseGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/ir/IrJsTextTestCaseGenerated.java
@@ -136,6 +136,16 @@ public class IrJsTextTestCaseGenerated extends AbstractIrJsTextTestCase {
             runTest("compiler/testData/ir/irJsText/dynamic/dynamicWithImplicitCast.kt");
         }
 
+        @TestMetadata("implicitCastFromDynamic.kt")
+        public void testImplicitCastFromDynamic() throws Exception {
+            runTest("compiler/testData/ir/irJsText/dynamic/implicitCastFromDynamic.kt");
+        }
+
+        @TestMetadata("implicitCastToDynamic.kt")
+        public void testImplicitCastToDynamic() throws Exception {
+            runTest("compiler/testData/ir/irJsText/dynamic/implicitCastToDynamic.kt");
+        }
+
         @TestMetadata("invokeOperator.kt")
         public void testInvokeOperator() throws Exception {
             runTest("compiler/testData/ir/irJsText/dynamic/invokeOperator.kt");