diff --git a/test/modules/privacy_test.js b/test/modules/privacy_test.js
new file mode 100644
index 000000000..156d3e826
--- /dev/null
+++ b/test/modules/privacy_test.js
@@ -0,0 +1,56 @@
+const Path = require('path');
+
+const { assert } = require('chai');
+
+const Privacy = require('../../js/modules/privacy');
+
+
+const APP_ROOT_PATH = Path.join(__dirname, '..', '..', '..');
+
+describe('Privacy', () => {
+  describe('redactPhoneNumbers', () => {
+    it('should redact all phone numbers', () => {
+      const text = 'This is a log line with a phone number +12223334455\n' +
+        'and another one +13334445566';
+
+      const actual = Privacy.redactPhoneNumbers(text);
+      const expected = 'This is a log line with a phone number +[REDACTED]455\n' +
+        'and another one +[REDACTED]566';
+      assert.equal(actual, expected);
+    });
+  });
+
+  describe('redactGroupIds', () => {
+    it('should redact all group IDs', () => {
+      const text = 'This is a log line with two group IDs: group(123456789)\n' +
+        'and group(abcdefghij)';
+
+      const actual = Privacy.redactGroupIds(text);
+      const expected = 'This is a log line with two group IDs: group([REDACTED]789)\n' +
+        'and group([REDACTED]hij)';
+      assert.equal(actual, expected);
+    });
+  });
+
+  describe('redactAll', () => {
+    it('should redact all sensitive information', () => {
+      const text = 'This is a log line with sensitive information:\n' +
+        `path1 ${APP_ROOT_PATH}/main.js\n` +
+        'phone1 +12223334455 ipsum\n' +
+        'group1 group(123456789) doloret\n' +
+        `path2 file:///${APP_ROOT_PATH}/js/background.js.` +
+        'phone2 +13334445566 lorem\n' +
+        'group2 group(abcdefghij) doloret\n';
+
+      const actual = Privacy.redactAll(text);
+      const expected = 'This is a log line with sensitive information:\n' +
+        'path1 [REDACTED]/main.js\n' +
+        'phone1 +[REDACTED]455 ipsum\n' +
+        'group1 group([REDACTED]789) doloret\n' +
+        'path2 file:///[REDACTED]/js/background.js.' +
+        'phone2 +[REDACTED]566 lorem\n' +
+        'group2 group([REDACTED]hij) doloret\n';
+      assert.equal(actual, expected);
+    });
+  });
+});