diff --git a/__tests__/processor/Processor.test.ts b/__tests__/processor/Processor.test.ts
index 07cfe8404..7e1904240 100644
--- a/__tests__/processor/Processor.test.ts
+++ b/__tests__/processor/Processor.test.ts
@@ -7,6 +7,7 @@ import { inspect } from "util";
 import { Logger } from "../../src/utils/Logger";
 import { IResultsProcessorInput } from "../../src/processor/doc/jest/IResultsProcessorInput";
 import { ISubstitute } from "../../src/processor/doc/ISubstitute";
+import { Constants } from "../../src/processor/Constants";
 
 const simplePassingTests: IResultsProcessorInput = require("../__resources__/simplePassingTests.json");
 
@@ -28,7 +29,7 @@ describe("Processor tests", () => {
         });
 
         (Processor as any).logger = log;
-        const processed = Processor.run(simplePassingTests, {log: false});
+        const processed = Processor.run(simplePassingTests, { log: false });
         expect((log as any).writeStdout).not.toHaveBeenCalled();
         expect((log as any).writeStderr).not.toHaveBeenCalled();
     });
@@ -88,6 +89,20 @@ describe("Processor tests", () => {
         expect(processed).toMatchSnapshot();
     });
 
+
+    it("should create file names correctly when default 'resultDir' is used", async () => {
+        IO.mkdirsSync = jest.fn(
+            () => {
+                // do nothing
+            }
+        );
+        const processed = Processor.run(simplePassingTests, { resultDir: undefined }); // don't specify result dir
+        // old version left off the slash after the default result directory
+        expect(IO.mkdirsSync).toHaveBeenCalledWith(Constants.DEFAULT_RESULTS_DIR + "/css/");
+        expect(IO.mkdirsSync).toHaveBeenCalledWith(Constants.DEFAULT_RESULTS_DIR + "/js/");
+    });
+
+
     it("should error when called without input", () => {
         let error;
         try {
diff --git a/__tests__/processor/__snapshots__/Processor.test.ts.snap b/__tests__/processor/__snapshots__/Processor.test.ts.snap
index 9ec792a60..8da13c006 100644
--- a/__tests__/processor/__snapshots__/Processor.test.ts.snap
+++ b/__tests__/processor/__snapshots__/Processor.test.ts.snap
@@ -3,12 +3,12 @@
 exports[`Processor tests should accept override html and JSON file name 1`] = `
 Object {
   "jestStareConfig": Object {
-    "resultDir": "./jest-stare",
+    "resultDir": "./jest-stare/",
     "resultHtml": "index.html",
     "resultJson": "jest-results.json",
   },
   "rawJestStareConfig": "{
-  \\"resultDir\\": \\"./jest-stare\\",
+  \\"resultDir\\": \\"./jest-stare/\\",
   \\"resultHtml\\": \\"index.html\\",
   \\"resultJson\\": \\"jest-results.json\\"
 }",
@@ -304,14 +304,14 @@ Object {
 exports[`Processor tests should accept override html and JSON file name 2`] = `
 Object {
   "jestStareConfig": Object {
-    "resultDir": "./jest-stare",
+    "resultDir": "./jest-stare/",
     "resultHtml": "test.html",
     "resultJson": "test.json",
   },
   "rawJestStareConfig": "{
   \\"resultHtml\\": \\"test.html\\",
   \\"resultJson\\": \\"test.json\\",
-  \\"resultDir\\": \\"./jest-stare\\"
+  \\"resultDir\\": \\"./jest-stare/\\"
 }",
   "rawResults": "{
   \\"numFailedTestSuites\\": \\"0\\",
diff --git a/package.json b/package.json
index bc008f7d9..ad97d1cd1 100644
--- a/package.json
+++ b/package.json
@@ -110,7 +110,6 @@
     "testResultsProcessor": "./"
   },
   "jest-stare": {
-    "resultDir": "results/jest-stare",
     "additionalResultsProcessors": [
       "jest-html-reporter",
       "jest-junit"
diff --git a/src/processor/Config.ts b/src/processor/Config.ts
index 2bb917a43..f5a9b9022 100644
--- a/src/processor/Config.ts
+++ b/src/processor/Config.ts
@@ -18,7 +18,7 @@ export class Config {
      * @param {IJestStareConfig} mExplicitConfig - explicit configuration
      * @memberof Config
      */
-    constructor(private mLogger: Logger, private mExplicitConfig: IJestStareConfig, private mProcessParms: IProcessParms) {}
+    constructor(private mLogger: Logger, private mExplicitConfig: IJestStareConfig, private mProcessParms: IProcessParms) { }
 
     /**
      * Build config from explicit config, package.json, and defaults
@@ -47,7 +47,7 @@ export class Config {
         }
 
         if (config.resultDir == null) {
-            config.resultDir = Constants.DEFAULT_RESULTS_DIR;
+            config.resultDir = Constants.DEFAULT_RESULTS_DIR + "/";
         } else {
             config.resultDir = config.resultDir + "/"; // append an extra slash in case the user didn't add one
         }