diff --git a/tests/baselines/reference/unionTypeCallSignatures.errors.txt b/tests/baselines/reference/unionTypeCallSignatures.errors.txt
index ebe38a589ee..bf1de6ff8e8 100644
--- a/tests/baselines/reference/unionTypeCallSignatures.errors.txt
+++ b/tests/baselines/reference/unionTypeCallSignatures.errors.txt
@@ -28,9 +28,10 @@ tests/cases/conformance/types/union/unionTypeCallSignatures.ts(67,12): error TS2
 tests/cases/conformance/types/union/unionTypeCallSignatures.ts(68,12): error TS2346: Supplied parameters do not match any signature of call target.
 tests/cases/conformance/types/union/unionTypeCallSignatures.ts(69,12): error TS2346: Supplied parameters do not match any signature of call target.
 tests/cases/conformance/types/union/unionTypeCallSignatures.ts(70,12): error TS2346: Supplied parameters do not match any signature of call target.
+tests/cases/conformance/types/union/unionTypeCallSignatures.ts(73,12): error TS2346: Supplied parameters do not match any signature of call target.
 
 
-==== tests/cases/conformance/types/union/unionTypeCallSignatures.ts (30 errors) ====
+==== tests/cases/conformance/types/union/unionTypeCallSignatures.ts (31 errors) ====
     var numOrDate: number | Date;
     var strOrBoolean: string | boolean;
     var strOrNum: string | number;
@@ -162,4 +163,9 @@ tests/cases/conformance/types/union/unionTypeCallSignatures.ts(70,12): error TS2
                ~~~~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS2346: Supplied parameters do not match any signature of call target.
     
+    var unionWithRestParameter4: { (...a: string[]): string; } | { (a: string, b: string): number; };
+    strOrNum = unionWithRestParameter4("hello"); // error supplied parameters do not match any call signature
+               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2346: Supplied parameters do not match any signature of call target.
+    strOrNum = unionWithRestParameter4("hello", "world");
     
\ No newline at end of file
diff --git a/tests/baselines/reference/unionTypeCallSignatures.js b/tests/baselines/reference/unionTypeCallSignatures.js
index fc3dfc8ebbc..103d92fbef3 100644
--- a/tests/baselines/reference/unionTypeCallSignatures.js
+++ b/tests/baselines/reference/unionTypeCallSignatures.js
@@ -70,6 +70,9 @@ strOrNum = unionWithRestParameter3('hello', 10, 11); // error no call signature
 strOrNum = unionWithRestParameter3('hello', "hello"); // error no call signature
 strOrNum = unionWithRestParameter3(); // error no call signature
 
+var unionWithRestParameter4: { (...a: string[]): string; } | { (a: string, b: string): number; };
+strOrNum = unionWithRestParameter4("hello"); // error supplied parameters do not match any call signature
+strOrNum = unionWithRestParameter4("hello", "world");
 
 
 //// [unionTypeCallSignatures.js]
@@ -132,3 +135,6 @@ strOrNum = unionWithRestParameter3('hello', 10); // error no call signature
 strOrNum = unionWithRestParameter3('hello', 10, 11); // error no call signature
 strOrNum = unionWithRestParameter3('hello', "hello"); // error no call signature
 strOrNum = unionWithRestParameter3(); // error no call signature
+var unionWithRestParameter4;
+strOrNum = unionWithRestParameter4("hello"); // error supplied parameters do not match any call signature
+strOrNum = unionWithRestParameter4("hello", "world");
diff --git a/tests/cases/conformance/types/union/unionTypeCallSignatures.ts b/tests/cases/conformance/types/union/unionTypeCallSignatures.ts
index ca599329743..a25d27d9a29 100644
--- a/tests/cases/conformance/types/union/unionTypeCallSignatures.ts
+++ b/tests/cases/conformance/types/union/unionTypeCallSignatures.ts
@@ -69,3 +69,6 @@ strOrNum = unionWithRestParameter3('hello', 10, 11); // error no call signature
 strOrNum = unionWithRestParameter3('hello', "hello"); // error no call signature
 strOrNum = unionWithRestParameter3(); // error no call signature
 
+var unionWithRestParameter4: { (...a: string[]): string; } | { (a: string, b: string): number; };
+strOrNum = unionWithRestParameter4("hello"); // error supplied parameters do not match any call signature
+strOrNum = unionWithRestParameter4("hello", "world");