diff --git a/src/formatters/vsoFormatter.ts b/src/formatters/vsoFormatter.ts
index fd8d9b7e080..fcc8a01428a 100644
--- a/src/formatters/vsoFormatter.ts
+++ b/src/formatters/vsoFormatter.ts
@@ -34,10 +34,8 @@ export class Formatter extends AbstractFormatter {
     };
     /* tslint:enable:object-literal-sort-keys */
 
-    public format(failures: RuleFailure[], warnings: RuleFailure[] = []): string {
-        const all = failures.concat(warnings);
-
-        const outputLines = all.map((failure: RuleFailure) => {
+    public format(failures: RuleFailure[]): string {
+        const outputLines = failures.map((failure: RuleFailure) => {
             const fileName = failure.getFileName();
             const failureString = failure.getFailure();
             const lineAndCharacter = failure.getStartPosition().getLineAndCharacter();
diff --git a/test/formatters/vsoFormatterTests.ts b/test/formatters/vsoFormatterTests.ts
index db4b528fae6..6cb4c7d07f9 100644
--- a/test/formatters/vsoFormatterTests.ts
+++ b/test/formatters/vsoFormatterTests.ts
@@ -49,6 +49,26 @@ describe("VSO Formatter", () => {
         assert.equal(actualResult, expectedResult);
     });
 
+    it("does not duplicate output for fixed failures", () => {
+        const maxPosition = sourceFile.getFullWidth();
+
+        const failures = [
+            createFailure(sourceFile, 0, 1, "first failure", "first-name", undefined, "error"),
+            createFailure(sourceFile, 32, 36, "mid failure", "mid-name", undefined, "error"),
+            createFailure(sourceFile, maxPosition - 1, maxPosition, "last failure", "last-name", undefined, "error"),
+        ];
+
+        const expectedResult =
+            getFailureString(TEST_FILE, 1,  1, "first failure", "first-name") +
+            getFailureString(TEST_FILE, 2, 12, "mid failure", "mid-name") +
+            getFailureString(TEST_FILE, 9,  2,  "last failure", "last-name");
+
+        const fixed = failures.slice();
+
+        const actualResult = formatter.format(failures, fixed);
+        assert.equal(actualResult, expectedResult);
+    });
+
     it("handles no failures", () => {
         const result = formatter.format([]);
         assert.equal(result, "\n");