diff --git a/static/js/tracker/trackerediting_test.js b/static/js/tracker/trackerediting_test.js
new file mode 100644
index 0000000..27d45bf
--- /dev/null
+++ b/static/js/tracker/trackerediting_test.js
@@ -0,0 +1,69 @@
+/* Copyright 2016 The Chromium Authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file or at
+ * https://developers.google.com/open-source/licenses/bsd
+ */
+
+
+function testKeepJustSummaryPrefixes_NoPrefixes() {
+  assertEquals(
+      '',
+      TKR_keepJustSummaryPrefixes(''));
+
+  assertEquals(
+      '',
+      TKR_keepJustSummaryPrefixes('Enter one line summary'));
+
+  assertEquals(
+      '',
+      TKR_keepJustSummaryPrefixes('Translation problem [en]'));
+
+  assertEquals(
+      '',
+      TKR_keepJustSummaryPrefixes('Crash at HH:MM'));
+}
+
+function testKeepJustSummaryPrefixes_WithColons() {
+  assertEquals(
+      'Security: ',
+      TKR_keepJustSummaryPrefixes('Security:'));
+
+  assertEquals(
+      'Exploit: ',
+      TKR_keepJustSummaryPrefixes('Exploit: remote exploit'));
+
+  assertEquals(
+      'XSS:Security: ',
+      TKR_keepJustSummaryPrefixes('XSS:Security: rest of summary'));
+
+  assertEquals(
+      'XSS: Security: ',
+      TKR_keepJustSummaryPrefixes('XSS: Security: rest of summary'));
+
+  assertEquals(
+      'XSS-Security: ',
+      TKR_keepJustSummaryPrefixes('XSS-Security: rest of summary'));
+
+  assertEquals(
+      'XSS: Security: ',
+      TKR_keepJustSummaryPrefixes('XSS: Security: rest [of] su:mmary'));
+
+  assertEquals(
+      'XSS-Security: ',
+      TKR_keepJustSummaryPrefixes('XSS-Security: rest [of] su:mmary'));
+}
+
+function testKeepJustSummaryPrefixes_WithBrackets() {
+  assertEquals(
+      '[Printing] ',
+      TKR_keepJustSummaryPrefixes('[Printing] problem with page'));
+
+  assertEquals(
+      '[Printing] ',
+      TKR_keepJustSummaryPrefixes('[Printing]   problem with page'));
+
+  assertEquals(
+      '[l10n][en] ',
+      TKR_keepJustSummaryPrefixes('[l10n][en]Translation problem'));
+}