diff --git a/tests/gui/modules/progress-status.spec.js b/tests/gui/modules/progress-status.spec.js
deleted file mode 100644
index 8c4fd44c..00000000
--- a/tests/gui/modules/progress-status.spec.js
+++ /dev/null
@@ -1,115 +0,0 @@
-'use strict'
-
-const m = require('mochainon')
-// eslint-disable-next-line node/no-missing-require
-const settings = require('../../../lib/gui/app/models/settings')
-// eslint-disable-next-line node/no-missing-require
-const progressStatus = require('../../../lib/gui/app/modules/progress-status')
-
-describe('Browser: progressStatus', function () {
-  describe('.fromFlashState()', function () {
-    beforeEach(function () {
-      this.state = {
-        flashing: 1,
-        verifying: 0,
-        successful: 0,
-        failed: 0,
-        percentage: 0,
-        eta: 15,
-        speed: 100000000000000
-      }
-
-      settings.set('unmountOnSuccess', true)
-      settings.set('validateWriteOnSuccess', true)
-    })
-
-    it('should report 0% if percentage == 0 but speed != 0', function () {
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('0% Flashing')
-    })
-
-    it('should handle percentage == 0, flashing, unmountOnSuccess', function () {
-      this.state.speed = 0
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('Starting...')
-    })
-
-    it('should handle percentage == 0, flashing, !unmountOnSuccess', function () {
-      this.state.speed = 0
-      settings.set('unmountOnSuccess', false)
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('Starting...')
-    })
-
-    it('should handle percentage == 0, verifying, unmountOnSuccess', function () {
-      this.state.speed = 0
-      this.state.flashing = 0
-      this.state.verifying = 1
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('Validating...')
-    })
-
-    it('should handle percentage == 0, verifying, !unmountOnSuccess', function () {
-      this.state.speed = 0
-      this.state.flashing = 0
-      this.state.verifying = 1
-      settings.set('unmountOnSuccess', false)
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('Validating...')
-    })
-
-    it('should handle percentage == 50, flashing, unmountOnSuccess', function () {
-      this.state.percentage = 50
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('50% Flashing')
-    })
-
-    it('should handle percentage == 50, flashing, !unmountOnSuccess', function () {
-      this.state.percentage = 50
-      settings.set('unmountOnSuccess', false)
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('50% Flashing')
-    })
-
-    it('should handle percentage == 50, verifying, unmountOnSuccess', function () {
-      this.state.flashing = 0
-      this.state.verifying = 1
-      this.state.percentage = 50
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('50% Validating')
-    })
-
-    it('should handle percentage == 50, verifying, !unmountOnSuccess', function () {
-      this.state.flashing = 0
-      this.state.verifying = 1
-      this.state.percentage = 50
-      settings.set('unmountOnSuccess', false)
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('50% Validating')
-    })
-
-    it('should handle percentage == 100, flashing, unmountOnSuccess, validateWriteOnSuccess', function () {
-      this.state.percentage = 100
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('Finishing...')
-    })
-
-    it('should handle percentage == 100, flashing, unmountOnSuccess, !validateWriteOnSuccess', function () {
-      this.state.percentage = 100
-      settings.set('validateWriteOnSuccess', false)
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('Unmounting...')
-    })
-
-    it('should handle percentage == 100, flashing, !unmountOnSuccess, !validateWriteOnSuccess', function () {
-      this.state.percentage = 100
-      settings.set('unmountOnSuccess', false)
-      settings.set('validateWriteOnSuccess', false)
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('Finishing...')
-    })
-
-    it('should handle percentage == 100, verifying, unmountOnSuccess', function () {
-      this.state.flashing = 0
-      this.state.verifying = 1
-      this.state.percentage = 100
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('Unmounting...')
-    })
-
-    it('should handle percentage == 100, validatinf, !unmountOnSuccess', function () {
-      this.state.flashing = 0
-      this.state.verifying = 1
-      this.state.percentage = 100
-      settings.set('unmountOnSuccess', false)
-      m.chai.expect(progressStatus.fromFlashState(this.state)).to.equal('Finishing...')
-    })
-  })
-})
diff --git a/tests/gui/modules/progress-status.spec.ts b/tests/gui/modules/progress-status.spec.ts
new file mode 100644
index 00000000..cc9e3a33
--- /dev/null
+++ b/tests/gui/modules/progress-status.spec.ts
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2020 balena.io
+ *
+ * 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.
+ */
+
+import { expect } from 'chai';
+
+import * as settings from '../../../lib/gui/app/models/settings';
+import * as progressStatus from '../../../lib/gui/app/modules/progress-status';
+
+describe('Browser: progressStatus', function() {
+	describe('.fromFlashState()', function() {
+		beforeEach(function() {
+			this.state = {
+				flashing: 1,
+				verifying: 0,
+				successful: 0,
+				failed: 0,
+				percentage: 0,
+				eta: 15,
+				speed: 100000000000000,
+			};
+
+			settings.set('unmountOnSuccess', true);
+			settings.set('validateWriteOnSuccess', true);
+		});
+
+		it('should report 0% if percentage == 0 but speed != 0', function() {
+			expect(progressStatus.fromFlashState(this.state)).to.equal('0% Flashing');
+		});
+
+		it('should handle percentage == 0, flashing, unmountOnSuccess', function() {
+			this.state.speed = 0;
+			expect(progressStatus.fromFlashState(this.state)).to.equal('Starting...');
+		});
+
+		it('should handle percentage == 0, flashing, !unmountOnSuccess', function() {
+			this.state.speed = 0;
+			settings.set('unmountOnSuccess', false);
+			expect(progressStatus.fromFlashState(this.state)).to.equal('Starting...');
+		});
+
+		it('should handle percentage == 0, verifying, unmountOnSuccess', function() {
+			this.state.speed = 0;
+			this.state.flashing = 0;
+			this.state.verifying = 1;
+			expect(progressStatus.fromFlashState(this.state)).to.equal(
+				'Validating...',
+			);
+		});
+
+		it('should handle percentage == 0, verifying, !unmountOnSuccess', function() {
+			this.state.speed = 0;
+			this.state.flashing = 0;
+			this.state.verifying = 1;
+			settings.set('unmountOnSuccess', false);
+			expect(progressStatus.fromFlashState(this.state)).to.equal(
+				'Validating...',
+			);
+		});
+
+		it('should handle percentage == 50, flashing, unmountOnSuccess', function() {
+			this.state.percentage = 50;
+			expect(progressStatus.fromFlashState(this.state)).to.equal(
+				'50% Flashing',
+			);
+		});
+
+		it('should handle percentage == 50, flashing, !unmountOnSuccess', function() {
+			this.state.percentage = 50;
+			settings.set('unmountOnSuccess', false);
+			expect(progressStatus.fromFlashState(this.state)).to.equal(
+				'50% Flashing',
+			);
+		});
+
+		it('should handle percentage == 50, verifying, unmountOnSuccess', function() {
+			this.state.flashing = 0;
+			this.state.verifying = 1;
+			this.state.percentage = 50;
+			expect(progressStatus.fromFlashState(this.state)).to.equal(
+				'50% Validating',
+			);
+		});
+
+		it('should handle percentage == 50, verifying, !unmountOnSuccess', function() {
+			this.state.flashing = 0;
+			this.state.verifying = 1;
+			this.state.percentage = 50;
+			settings.set('unmountOnSuccess', false);
+			expect(progressStatus.fromFlashState(this.state)).to.equal(
+				'50% Validating',
+			);
+		});
+
+		it('should handle percentage == 100, flashing, unmountOnSuccess, validateWriteOnSuccess', function() {
+			this.state.percentage = 100;
+			expect(progressStatus.fromFlashState(this.state)).to.equal(
+				'Finishing...',
+			);
+		});
+
+		it('should handle percentage == 100, flashing, unmountOnSuccess, !validateWriteOnSuccess', function() {
+			this.state.percentage = 100;
+			settings.set('validateWriteOnSuccess', false);
+			expect(progressStatus.fromFlashState(this.state)).to.equal(
+				'Unmounting...',
+			);
+		});
+
+		it('should handle percentage == 100, flashing, !unmountOnSuccess, !validateWriteOnSuccess', function() {
+			this.state.percentage = 100;
+			settings.set('unmountOnSuccess', false);
+			settings.set('validateWriteOnSuccess', false);
+			expect(progressStatus.fromFlashState(this.state)).to.equal(
+				'Finishing...',
+			);
+		});
+
+		it('should handle percentage == 100, verifying, unmountOnSuccess', function() {
+			this.state.flashing = 0;
+			this.state.verifying = 1;
+			this.state.percentage = 100;
+			expect(progressStatus.fromFlashState(this.state)).to.equal(
+				'Unmounting...',
+			);
+		});
+
+		it('should handle percentage == 100, validatinf, !unmountOnSuccess', function() {
+			this.state.flashing = 0;
+			this.state.verifying = 1;
+			this.state.percentage = 100;
+			settings.set('unmountOnSuccess', false);
+			expect(progressStatus.fromFlashState(this.state)).to.equal(
+				'Finishing...',
+			);
+		});
+	});
+});