diff --git a/README.md b/README.md
index 520aa4d..d8f1aff 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 ## FusionAuth TypeScript Client 
 ![semver 2.0.0 compliant](http://img.shields.io/badge/semver-2.0.0-brightgreen.svg?style=flat-square) [![npm](https://img.shields.io/npm/v/@fusionauth/typescript-client?style=flat-square)](https://www.npmjs.com/package/@fusionauth/typescript-client)
 
-If you're integrating FusionAuth with a Typescript application, this library will speed up your development time.
+If you're integrating FusionAuth with a Typescript application, this library will speed up your development time. It also works with node and browser applications as well.
 
 For additional information and documentation on FusionAuth refer to [https://fusionauth.io](https://fusionauth.io).
 
@@ -18,3 +18,8 @@ npm install @fusionauth/typescript-client
 Refer to the FusionAuth API documentation to for request and response formats. 
 * https://fusionauth.io/docs/v1/tech/apis/
 * https://fusionauth.io/docs/v1/tech/client-libraries/typescript
+
+## Development
+
+* Set up a fusionauth instance. (Not sure exactly how to configure, TBD.)
+* `sb test`
diff --git a/package-lock.json b/package-lock.json
index d292c2d..3eda13e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@fusionauth/typescript-client",
-  "version": "1.17.0",
+  "version": "1.17.3",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index f61b3bc..e75472e 100644
--- a/package.json
+++ b/package.json
@@ -18,10 +18,10 @@
     "dist/fusionauth-typescript-client.*"
   ],
   "scripts": {
-    "test": "npx mocha build/test/FusionAuthClientTest.js && npx karma start",
+    "test": "npx mocha build/test/*.js && npx karma start",
     "build-browser": "mkdir -p dist && npx browserify index.ts --standalone FusionAuth --debug -p [ tsify --target=es5 ] -t browserify-shim -o dist/fusionauth-typescript-client.js",
     "build-browser-min": "mkdir -p dist && npx browserify index.ts --standalone FusionAuth --debug -p [ tsify --target=es5 ] -t browserify-shim -t uglifyify | npx uglifyjs --source-map base -o dist/fusionauth-typescript-client.min.js",
-    "pretest": "npx tsc && npx tsc -p test && mkdir -p dist && npx browserify test/FusionAuthClientTest.ts --debug -t envify -p [ tsify --target=es5 -p test ] -t browserify-shim -t uglifyify | npx uglifyjs --source-map base -o dist/fusionauth-typescript-client-test.min.js",
+    "pretest": "npx tsc && npx tsc -p test && mkdir -p dist && npx browserify test/*.ts --debug -t envify -p [ tsify --target=es5 -p test ] -t browserify-shim -t uglifyify | npx uglifyjs --source-map base -o dist/fusionauth-typescript-client-test.min.js",
     "prepare": "npx tsc && npm run build-browser && npm run build-browser-min"
   },
   "repository": {
diff --git a/src/DefaultRESTClient.ts b/src/DefaultRESTClient.ts
index b24e3fc..3c11b12 100644
--- a/src/DefaultRESTClient.ts
+++ b/src/DefaultRESTClient.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, FusionAuth, All Rights Reserved
+ * Copyright (c) 2020, FusionAuth, All Rights Reserved
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -82,6 +82,15 @@ export default class DefaultRESTClient<RT, ERT> implements IRESTClient<RT, ERT>
    * @param body The object to be written to the request body as form data.
    */
   withFormData(body: URLSearchParams): DefaultRESTClient<RT, ERT> {
+    const body2 = new URLSearchParams();
+    if (body) { 
+      body.forEach((value, name, searchParams) => {
+        if (value && value.length > 0 && value != "null" && value != "undefined") {
+          body2.set(name,value);
+        }
+      });
+      body = body2;
+    }
     this.body = body;
     this.withHeader('Content-Type', 'application/x-www-form-urlencoded');
     return this;
diff --git a/test/DefaultRESTClientTest.ts b/test/DefaultRESTClientTest.ts
new file mode 100644
index 0000000..7eeec71
--- /dev/null
+++ b/test/DefaultRESTClientTest.ts
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2020, FusionAuth, All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific
+ * language governing permissions and limitations under the License.
+ */
+
+'use strict';
+
+import * as chai from 'chai';
+import DefaultRESTClient from "../src/DefaultRESTClient"
+import {URLSearchParams} from "url";
+
+
+describe('#DefaultRESTClient()', function () {
+
+  it('Can Create DefaultRESTClient', async () => {
+    const client = new DefaultRESTClient('http://localhost:9011');
+    chai.assert.isNotNull(client);
+  });
+
+  describe('withFormData', function () {
+    it('null', async () => {
+      const client = new DefaultRESTClient('http://localhost:9011');
+      let body = client.withFormData(null).body;
+      chai.assert.isNull(body);
+    });
+
+    it('empty', async () => {
+      const client = new DefaultRESTClient('http://localhost:9011');
+      let params = new URLSearchParams();
+      let body = client.withFormData(params).body;
+      chai.assert.isNotNull(body);
+      chai.assert.strictEqual(body.toString(), "");
+    });
+
+    it('with one value', async () => {
+      const client = new DefaultRESTClient('http://localhost:9011');
+      let params = new URLSearchParams();
+      params.set('key','value');
+      let body = client.withFormData(params).body;
+      chai.assert.isNotNull(body);
+      chai.assert.strictEqual(body.toString(), "key=value");
+    });
+
+    it('with two values', async () => {
+      const client = new DefaultRESTClient('http://localhost:9011');
+      let params = new URLSearchParams();
+      params.set('key','value');
+      params.set('key2','value2');
+      let body = client.withFormData(params).body;
+      chai.assert.isNotNull(body);
+      chai.assert.strictEqual(body.toString(), "key=value&key2=value2");
+    });
+
+    it('skips undefined value', async () => {
+      const client = new DefaultRESTClient('http://localhost:9011');
+      let params = new URLSearchParams();
+      params.set('key','value');
+      params.set('key2',undefined);
+      let body = client.withFormData(params).body;
+      chai.assert.isNotNull(body);
+      chai.assert.strictEqual(body.toString(), "key=value");
+    });
+
+    it('skips null value', async () => {
+      const client = new DefaultRESTClient('http://localhost:9011');
+      let params = new URLSearchParams();
+      params.set('key','value');
+      params.set('key2',null);
+      let body = client.withFormData(params).body;
+      chai.assert.isNotNull(body);
+      chai.assert.strictEqual(body.toString(), "key=value");
+    });
+
+    it('sets content type', async () => {
+      const client = new DefaultRESTClient('http://localhost:9011');
+      let params = new URLSearchParams();
+      let headers = client.withFormData(params).headers
+      chai.assert.isNotNull(headers);
+      chai.assert.strictEqual(headers['Content-Type'], "application/x-www-form-urlencoded");
+    });
+
+  });
+
+});
diff --git a/test/tsconfig.json b/test/tsconfig.json
index 9dae5cb..173de2f 100644
--- a/test/tsconfig.json
+++ b/test/tsconfig.json
@@ -1,7 +1,8 @@
 {
   "extends": "../tsconfig.json",
   "files": [
-    "FusionAuthClientTest.ts"
+    "FusionAuthClientTest.ts",
+    "DefaultRESTClientTest.ts"
   ],
   "compilerOptions": {
     "types": [
@@ -11,4 +12,4 @@
       "chai"
     ]
   }
-}
\ No newline at end of file
+}