diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 3274e81ce818d..a99128fbf6b76 100755
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -331,11 +331,11 @@ namespace ts {
                 }
 
                 output += formatColorAndReset(relativeFileName, ForegroundColorEscapeSequences.Cyan);
-                output += "(";
+                output += ":";
                 output += formatColorAndReset(`${ firstLine + 1 }`, ForegroundColorEscapeSequences.Yellow);
-                output += ",";
+                output += ":";
                 output += formatColorAndReset(`${ firstLineChar + 1 }`, ForegroundColorEscapeSequences.Yellow);
-                output += "): ";
+                output += " - ";
             }
 
             const categoryColor = getCategoryFormat(diagnostic.category);
diff --git a/tests/baselines/reference/prettyContextNotDebugAssertion.errors.txt b/tests/baselines/reference/prettyContextNotDebugAssertion.errors.txt
index f03b87ba94749..3c94d3bd0b8f3 100644
--- a/tests/baselines/reference/prettyContextNotDebugAssertion.errors.txt
+++ b/tests/baselines/reference/prettyContextNotDebugAssertion.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/index.ts(2,1): error TS1005: '}' expected.
+tests/cases/compiler/index.ts:2:1 - error TS1005: '}' expected.
 
 2