diff --git a/src/extensions/index.ts b/src/extensions/index.ts
index 97367b9a9..14b5c9da0 100644
--- a/src/extensions/index.ts
+++ b/src/extensions/index.ts
@@ -26,6 +26,12 @@ export const _brs_ = new RoAssociativeArray([
     { name: new BrsString("runInScope"), value: RunInScope },
     { name: new BrsString("process"), value: Process },
     { name: new BrsString("global"), value: mGlobal },
+    { name: new BrsString("testData"), value: new RoAssociativeArray([]) },
     { name: new BrsString("triggerKeyEvent"), value: triggerKeyEvent },
     { name: new BrsString("getStackTrace"), value: GetStackTrace },
 ]);
+
+/** resets _brs_.testData values to `{}` in brightscript representation */
+export function resetTestData() {
+    _brs_.set(new BrsString("testData"), new RoAssociativeArray([]));
+}
diff --git a/src/index.ts b/src/index.ts
index 8836b1627..1b25baf05 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -16,6 +16,7 @@ import {
 } from "./componentprocessor";
 import { Parser } from "./parser";
 import { Interpreter, ExecutionOptions, defaultExecutionOptions } from "./interpreter";
+import { resetTestData } from "./extensions";
 import * as BrsError from "./Error";
 import * as LexerParser from "./LexerParser";
 import { CoverageCollector } from "./coverage";
@@ -230,6 +231,7 @@ export async function createExecuteWithScope(
     interpreter.errors = [];
 
     return (filenames: string[], args: BrsTypes.BrsType[]) => {
+        resetTestData();
         let ast = lexParseSync(filenames, interpreter.options);
         let execErrors: BrsError.BrsError[] = [];
         let returnValue = interpreter.inSubEnv((subInterpreter) => {
diff --git a/test/extensions/testData.test.js b/test/extensions/testData.test.js
new file mode 100644
index 000000000..97289d6e0
--- /dev/null
+++ b/test/extensions/testData.test.js
@@ -0,0 +1,30 @@
+const brs = require("brs");
+const { BrsString, BrsInvalid, ValueKind } = brs.types;
+const { Interpreter } = require("../../lib/interpreter");
+const { identifier } = require("../parser/ParserTests");
+const { resetTestData } = require("../../lib/extensions");
+
+describe("_brs_.testData", () => {
+    it("check testData object", () => {
+        let _brs_ = new Interpreter().environment.get(identifier("_brs_"));
+        let testData = _brs_.get(new BrsString("testData"));
+
+        expect(testData.kind).toBe(ValueKind.Object);
+        expect(testData.componentName).toBe("roAssociativeArray");
+        expect(testData.elements.size).toBe(0);
+        testData.set(new BrsString("foo"), BrsInvalid.Instance);
+        expect(testData.elements.size).toBe(1);
+
+        testData = new Interpreter().environment
+            .get(identifier("_brs_"))
+            .get(new BrsString("testData"));
+        expect(testData.elements.size).toBe(1);
+
+        resetTestData(); // will clear testData for next new Interpreter instances
+
+        testData = new Interpreter().environment
+            .get(identifier("_brs_"))
+            .get(new BrsString("testData"));
+        expect(testData.elements.size).toBe(0);
+    });
+});