diff --git a/tests/baselines/reference/metadataOfUnion.js b/tests/baselines/reference/metadataOfUnion.js
index 16d0e9c08b8..9a88481c80a 100644
--- a/tests/baselines/reference/metadataOfUnion.js
+++ b/tests/baselines/reference/metadataOfUnion.js
@@ -13,6 +13,27 @@ class B {
 
     @PropDeco
     z: "foo" | boolean;
+}
+
+enum E {
+    A,
+    B,
+    C,
+    D
+}
+
+class D {
+    @PropDeco
+    a: E.A;
+
+    @PropDeco
+    b: E.B | E.C;
+
+    @PropDeco
+    c: E;
+
+    @PropDeco
+    d: E | number;
 }
 
 //// [metadataOfUnion.js]
@@ -48,3 +69,31 @@ __decorate([
     PropDeco,
     __metadata("design:type", Object)
 ], B.prototype, "z");
+var E;
+(function (E) {
+    E[E["A"] = 0] = "A";
+    E[E["B"] = 1] = "B";
+    E[E["C"] = 2] = "C";
+    E[E["D"] = 3] = "D";
+})(E || (E = {}));
+var D = (function () {
+    function D() {
+    }
+    return D;
+}());
+__decorate([
+    PropDeco,
+    __metadata("design:type", Number)
+], D.prototype, "a");
+__decorate([
+    PropDeco,
+    __metadata("design:type", Number)
+], D.prototype, "b");
+__decorate([
+    PropDeco,
+    __metadata("design:type", Number)
+], D.prototype, "c");
+__decorate([
+    PropDeco,
+    __metadata("design:type", Number)
+], D.prototype, "d");
diff --git a/tests/baselines/reference/metadataOfUnion.symbols b/tests/baselines/reference/metadataOfUnion.symbols
index 92934ad2025..22c0cc37602 100644
--- a/tests/baselines/reference/metadataOfUnion.symbols
+++ b/tests/baselines/reference/metadataOfUnion.symbols
@@ -31,3 +31,55 @@ class B {
     z: "foo" | boolean;
 >z : Symbol(B.z, Decl(metadataOfUnion.ts, 10, 22))
 }
+
+enum E {
+>E : Symbol(E, Decl(metadataOfUnion.ts, 14, 1))
+
+    A,
+>A : Symbol(E.A, Decl(metadataOfUnion.ts, 16, 8))
+
+    B,
+>B : Symbol(E.B, Decl(metadataOfUnion.ts, 17, 6))
+
+    C,
+>C : Symbol(E.C, Decl(metadataOfUnion.ts, 18, 6))
+
+    D
+>D : Symbol(E.D, Decl(metadataOfUnion.ts, 19, 6))
+}
+
+class D {
+>D : Symbol(D, Decl(metadataOfUnion.ts, 21, 1))
+
+    @PropDeco
+>PropDeco : Symbol(PropDeco, Decl(metadataOfUnion.ts, 0, 0))
+
+    a: E.A;
+>a : Symbol(D.a, Decl(metadataOfUnion.ts, 23, 9))
+>E : Symbol(E, Decl(metadataOfUnion.ts, 14, 1))
+>A : Symbol(E.A, Decl(metadataOfUnion.ts, 16, 8))
+
+    @PropDeco
+>PropDeco : Symbol(PropDeco, Decl(metadataOfUnion.ts, 0, 0))
+
+    b: E.B | E.C;
+>b : Symbol(D.b, Decl(metadataOfUnion.ts, 25, 11))
+>E : Symbol(E, Decl(metadataOfUnion.ts, 14, 1))
+>B : Symbol(E.B, Decl(metadataOfUnion.ts, 17, 6))
+>E : Symbol(E, Decl(metadataOfUnion.ts, 14, 1))
+>C : Symbol(E.C, Decl(metadataOfUnion.ts, 18, 6))
+
+    @PropDeco
+>PropDeco : Symbol(PropDeco, Decl(metadataOfUnion.ts, 0, 0))
+
+    c: E;
+>c : Symbol(D.c, Decl(metadataOfUnion.ts, 28, 17))
+>E : Symbol(E, Decl(metadataOfUnion.ts, 14, 1))
+
+    @PropDeco
+>PropDeco : Symbol(PropDeco, Decl(metadataOfUnion.ts, 0, 0))
+
+    d: E | number;
+>d : Symbol(D.d, Decl(metadataOfUnion.ts, 31, 9))
+>E : Symbol(E, Decl(metadataOfUnion.ts, 14, 1))
+}
diff --git a/tests/baselines/reference/metadataOfUnion.types b/tests/baselines/reference/metadataOfUnion.types
index 07a2724bd51..08afc4e81bb 100644
--- a/tests/baselines/reference/metadataOfUnion.types
+++ b/tests/baselines/reference/metadataOfUnion.types
@@ -32,3 +32,55 @@ class B {
     z: "foo" | boolean;
 >z : boolean | "foo"
 }
+
+enum E {
+>E : E
+
+    A,
+>A : E.A
+
+    B,
+>B : E.B
+
+    C,
+>C : E.C
+
+    D
+>D : E.D
+}
+
+class D {
+>D : D
+
+    @PropDeco
+>PropDeco : (target: Object, propKey: string | symbol) => void
+
+    a: E.A;
+>a : E.A
+>E : any
+>A : E.A
+
+    @PropDeco
+>PropDeco : (target: Object, propKey: string | symbol) => void
+
+    b: E.B | E.C;
+>b : E.B | E.C
+>E : any
+>B : E.B
+>E : any
+>C : E.C
+
+    @PropDeco
+>PropDeco : (target: Object, propKey: string | symbol) => void
+
+    c: E;
+>c : E
+>E : E
+
+    @PropDeco
+>PropDeco : (target: Object, propKey: string | symbol) => void
+
+    d: E | number;
+>d : number | E
+>E : E
+}
diff --git a/tests/cases/compiler/metadataOfUnion.ts b/tests/cases/compiler/metadataOfUnion.ts
index 7676ea81e77..2093357cb31 100644
--- a/tests/cases/compiler/metadataOfUnion.ts
+++ b/tests/cases/compiler/metadataOfUnion.ts
@@ -14,4 +14,25 @@ class B {
 
     @PropDeco
     z: "foo" | boolean;
+}
+
+enum E {
+    A,
+    B,
+    C,
+    D
+}
+
+class D {
+    @PropDeco
+    a: E.A;
+
+    @PropDeco
+    b: E.B | E.C;
+
+    @PropDeco
+    c: E;
+
+    @PropDeco
+    d: E | number;
 }
\ No newline at end of file