diff --git a/tests/cases/compiler/numericLiteralsWithTrailingDecimalPoints01.ts b/tests/cases/compiler/numericLiteralsWithTrailingDecimalPoints01.ts
index 4e8e3529f3a..de45315d8ef 100644
--- a/tests/cases/compiler/numericLiteralsWithTrailingDecimalPoints01.ts
+++ b/tests/cases/compiler/numericLiteralsWithTrailingDecimalPoints01.ts
@@ -4,16 +4,32 @@
 1.toString();
 1.+2.0 + 3. ;
 
-// Preserve whitespace where important for JS compatibility
+// Preserve whitespace and comments where important for JS compatibility
 var i: number = 1;
-var test1 = i.toString();  
+var test1 = i.toString();
 var test2 = 2.toString();
 var test3 = 3 .toString();
 var test4 = 3    .toString();
-var test5 = 3	.toString(); 
+var test5 = 3	.toString();
 var test6 = 3.['toString']();
 var test7 = 3
 .toString();
 var test8 = new Number(4).toString();
-var test9 = 3. + 3.
-var test10 = 0 /* any comment */.toString();
+var test9 = 3. + 3.;
+var test10 = 0 /* comment */.toString();
+var test11 = 3. /* comment */ .toString();
+var test12 = 3
+  /* comment */ .toString();
+var test13 = 3.
+  /* comment */ .toString();
+var test14 = 3
+    // comment
+    .toString();
+var test15 = 3.
+    // comment
+    .toString();
+var test16 = 3  // comment time
+    .toString();
+var test17 = 3. // comment time again
+    .toString();
+
diff --git a/tests/cases/compiler/numericLiteralsWithTrailingDecimalPoints02.ts b/tests/cases/compiler/numericLiteralsWithTrailingDecimalPoints02.ts
new file mode 100644
index 00000000000..775175f70c0
--- /dev/null
+++ b/tests/cases/compiler/numericLiteralsWithTrailingDecimalPoints02.ts
@@ -0,0 +1,37 @@
+// @lib: es5
+// @removeComments: true
+
+1..toString();
+1.0.toString();
+1.toString();
+1.+2.0 + 3. ;
+
+// Preserve whitespace where important for JS compatibility
+var i: number = 1;
+var test1 = i.toString();
+var test2 = 2.toString();
+var test3 = 3 .toString();
+var test4 = 3    .toString();
+var test5 = 3	.toString();
+var test6 = 3.['toString']();
+var test7 = 3
+.toString();
+var test8 = new Number(4).toString();
+var test9 = 3. + 3.;
+var test10 = 0 /* comment */.toString();
+var test11 = 3. /* comment */ .toString();
+var test12 = 3
+  /* comment */ .toString();
+var test13 = 3.
+  /* comment */ .toString();
+var test14 = 3
+    // comment
+    .toString();
+var test15 = 3.
+    // comment
+    .toString();
+var test16 = 3  // comment time
+    .toString();
+var test17 = 3. // comment time again
+    .toString();
+