diff --git a/tests/baselines/reference/invalidLetInForOfAndForIn_ES5.errors.txt b/tests/baselines/reference/invalidLetInForOfAndForIn_ES5.errors.txt
index 2445ba63c7631..d6dc2b24611fa 100644
--- a/tests/baselines/reference/invalidLetInForOfAndForIn_ES5.errors.txt
+++ b/tests/baselines/reference/invalidLetInForOfAndForIn_ES5.errors.txt
@@ -2,11 +2,12 @@ invalidLetInForOfAndForIn_ES5.ts(5,13): error TS1005: ',' expected.
 invalidLetInForOfAndForIn_ES5.ts(5,14): error TS1181: Array element destructuring pattern expected.
 invalidLetInForOfAndForIn_ES5.ts(5,14): error TS2695: Left side of comma operator is unused and has no side effects.
 invalidLetInForOfAndForIn_ES5.ts(5,14): error TS2695: Left side of comma operator is unused and has no side effects.
+invalidLetInForOfAndForIn_ES5.ts(5,14): error TS2872: This kind of expression is always truthy.
 invalidLetInForOfAndForIn_ES5.ts(5,19): error TS1005: ';' expected.
 invalidLetInForOfAndForIn_ES5.ts(5,20): error TS1128: Declaration or statement expected.
 
 
-==== invalidLetInForOfAndForIn_ES5.ts (6 errors) ====
+==== invalidLetInForOfAndForIn_ES5.ts (7 errors) ====
     // This should be an error
     // More details: http://www.ecma-international.org/ecma-262/6.0/#sec-iteration-statements
     
@@ -20,6 +21,8 @@ invalidLetInForOfAndForIn_ES5.ts(5,20): error TS1128: Declaration or statement e
 !!! error TS2695: Left side of comma operator is unused and has no side effects.
                  ~~~
 !!! error TS2695: Left side of comma operator is unused and has no side effects.
+                 ~~~~~
+!!! error TS2872: This kind of expression is always truthy.
                       ~
 !!! error TS1005: ';' expected.
                        ~
diff --git a/tests/baselines/reference/invalidLetInForOfAndForIn_ES6.errors.txt b/tests/baselines/reference/invalidLetInForOfAndForIn_ES6.errors.txt
index cf35e02b1661e..7730b8e3b10fb 100644
--- a/tests/baselines/reference/invalidLetInForOfAndForIn_ES6.errors.txt
+++ b/tests/baselines/reference/invalidLetInForOfAndForIn_ES6.errors.txt
@@ -2,11 +2,12 @@ invalidLetInForOfAndForIn_ES6.ts(5,13): error TS1005: ',' expected.
 invalidLetInForOfAndForIn_ES6.ts(5,14): error TS1181: Array element destructuring pattern expected.
 invalidLetInForOfAndForIn_ES6.ts(5,14): error TS2695: Left side of comma operator is unused and has no side effects.
 invalidLetInForOfAndForIn_ES6.ts(5,14): error TS2695: Left side of comma operator is unused and has no side effects.
+invalidLetInForOfAndForIn_ES6.ts(5,14): error TS2872: This kind of expression is always truthy.
 invalidLetInForOfAndForIn_ES6.ts(5,19): error TS1005: ';' expected.
 invalidLetInForOfAndForIn_ES6.ts(5,20): error TS1128: Declaration or statement expected.
 
 
-==== invalidLetInForOfAndForIn_ES6.ts (6 errors) ====
+==== invalidLetInForOfAndForIn_ES6.ts (7 errors) ====
     // This should be an error
     // More details: http://www.ecma-international.org/ecma-262/6.0/#sec-iteration-statements
     
@@ -20,6 +21,8 @@ invalidLetInForOfAndForIn_ES6.ts(5,20): error TS1128: Declaration or statement e
 !!! error TS2695: Left side of comma operator is unused and has no side effects.
                  ~~~
 !!! error TS2695: Left side of comma operator is unused and has no side effects.
+                 ~~~~~
+!!! error TS2872: This kind of expression is always truthy.
                       ~
 !!! error TS1005: ';' expected.
                        ~