diff --git a/libs/tests/_locales/tests-jsdoc-strings.json b/libs/tests/_locales/tests-jsdoc-strings.json
index 42e3dbca..26924ab6 100644
--- a/libs/tests/_locales/tests-jsdoc-strings.json
+++ b/libs/tests/_locales/tests-jsdoc-strings.json
@@ -1,9 +1,11 @@
 {
-  "tests": "Unit tests framework",
+  "TestEvent": "Various test event in the execution cycle",
+  "tests": "A Unit tests framework",
   "tests.assert": "Checks a boolean condition",
   "tests.assertClose": "Checks that 2 values are close to each other",
   "tests.assertClose|param|actual": "what the value was",
   "tests.assertClose|param|expected": "what the value should be",
-  "tests.assertClose|param|tolerance": "the acceptable error margin",
+  "tests.assertClose|param|tolerance": "the acceptable error margin, eg: 5",
+  "tests.onEvent": "Registers code to be called at various points in the test execution",
   "tests.test": "Registers a test to run"
 }
\ No newline at end of file
diff --git a/libs/tests/_locales/tests-strings.json b/libs/tests/_locales/tests-strings.json
index 1f0abcb8..62661802 100644
--- a/libs/tests/_locales/tests-strings.json
+++ b/libs/tests/_locales/tests-strings.json
@@ -1,4 +1,9 @@
 {
+  "TestEvent.RunSetUp|block": "run setup",
+  "TestEvent.RunTearDown|block": "run teardown",
+  "TestEvent.TestSetUp|block": "test setup",
+  "TestEvent.TestTearDown|block": "test teardown",
+  "tests.assertClose|block": "assert %message|%expected|close to %actual|by %tolerance",
   "tests.assert|block": "assert %message|%condition",
   "tests.test|block": "test %name",
   "tests|block": "tests",
diff --git a/libs/tests/platformoverrides.ts b/libs/tests/platformoverrides.ts
new file mode 100644
index 00000000..1fc53915
--- /dev/null
+++ b/libs/tests/platformoverrides.ts
@@ -0,0 +1,12 @@
+// EV3 specific test functions
+tests.onEvent(TestEvent.RunSetUp, function() {
+    console.sendToScreen();
+})
+tests.onEvent(TestEvent.TestSetUp, function() {
+    motors.stopAllMotors();
+    motors.resetAllMotors();
+})
+tests.onEvent(TestEvent.TestTearDown, function() {
+    motors.stopAllMotors();
+    motors.resetAllMotors();
+})
diff --git a/libs/tests/pxt.json b/libs/tests/pxt.json
index f6b36b5e..b58c790b 100644
--- a/libs/tests/pxt.json
+++ b/libs/tests/pxt.json
@@ -3,11 +3,13 @@
     "description": "A unit test library",
     "files": [
         "README.md",
-        "tests.ts"
+        "tests.ts",
+        "platformoverrides.ts"
     ],
     "testFiles": [
     ],
     "public": true,
+    "additionalFilePath": "../../node_modules/pxt-common-packages/libs/tests",
     "dependencies": {
         "core": "file:../core"
     }
diff --git a/libs/tests/tests.ts b/libs/tests/tests.ts
deleted file mode 100644
index 971cb88a..00000000
--- a/libs/tests/tests.ts
+++ /dev/null
@@ -1,94 +0,0 @@
-/**
- * Unit tests framework
- */
-//% weight=100 color=#0fbc11 icon=""
-namespace tests {
-    class Test {
-        name: string;
-        handler: () => void;
-        errors: string[];
-
-        constructor(name: string, handler: () => void) {
-            this.name = name;
-            this.handler = handler;
-            this.errors = [];
-        }
-
-        reset() {
-            motors.stopAllMotors();
-            motors.resetAllMotors();
-        }
-
-        run() {
-            // clear state
-            this.reset();
-
-            console.log(`> ${this.name}`)
-            this.handler()
-
-            if (this.errors.length)
-                console.log('')
-
-            // ensure clean state after test
-            this.reset();
-        }
-    }
-
-    let _tests: Test[] = undefined;
-    let _currentTest: Test = undefined;
-
-    function run() {
-        if (!_tests) return;
-
-        const start = control.millis();
-        console.sendToScreen();
-        console.log(`${_tests.length} tests found`)
-        console.log(` `)
-        for (let i = 0; i < _tests.length; ++i) {
-            const t = _currentTest = _tests[i];
-            t.run();
-            _currentTest = undefined;
-        }
-        console.log(` `)
-        console.log(`${_tests.length} tests, ${_tests.map(t => t.errors.length).reduce((p, c) => p + c, 0)} errs in ${Math.ceil((control.millis() - start) / 1000)}s`)
-    }
-
-    /**
-     * Registers a test to run
-     */
-    //% blockId=testtest block="test %name"
-    export function test(name: string, handler: () => void): void {
-        if (!name || !handler) return;
-        if (!_tests) {
-            _tests = [];
-            control.runInBackground(function () {
-                // should run after on start
-                loops.pause(100)
-                run()
-            })
-        }
-        _tests.push(new Test(name, handler));
-    }
-
-    /** 
-     * Checks a boolean condition
-     */
-    //% blockId=testAssert block="assert %message|%condition"
-    export function assert(message: string, condition: boolean) {
-        if (!condition) {
-            console.log(`!!! ${message || ''}`)
-            if (_currentTest)
-                _currentTest.errors.push(message);
-        }
-    }
-
-    /**
-     * Checks that 2 values are close to each other
-     * @param expected what the value should be
-     * @param actual what the value was
-     * @param tolerance the acceptable error margin
-     */
-    export function assertClose(name: string, expected: number, actual: number, tolerance: number) {
-        assert(`${name} ${expected} != ${actual} +-${tolerance}`, Math.abs(expected - actual) <= tolerance);
-    }
-}
diff --git a/package.json b/package.json
index 545534fa..244ca603 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "webfonts-generator": "^0.4.0"
   },
   "dependencies": {
-    "pxt-common-packages": "0.14.13",
+    "pxt-common-packages": "0.15.1",
     "pxt-core": "3.0.5"
   },
   "scripts": {