diff --git a/browser/components/migration/MigrationUtils.jsm b/browser/components/migration/MigrationUtils.jsm
index 4bb31f51558f..a48a2549ef01 100644
--- a/browser/components/migration/MigrationUtils.jsm
+++ b/browser/components/migration/MigrationUtils.jsm
@@ -35,8 +35,6 @@ XPCOMUtils.defineLazyModuleGetter(this, "TelemetryStopwatch",
                                   "resource://gre/modules/TelemetryStopwatch.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "WindowsRegistry",
                                   "resource://gre/modules/WindowsRegistry.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "setTimeout",
-                                  "resource://gre/modules/Timer.jsm");
 
 var gMigrators = null;
 var gProfileStartup = null;
diff --git a/browser/components/migration/tests/unit/test_MigrationUtils_timedRetry.js b/browser/components/migration/tests/unit/test_MigrationUtils_timedRetry.js
deleted file mode 100644
index d55528d02597..000000000000
--- a/browser/components/migration/tests/unit/test_MigrationUtils_timedRetry.js
+++ /dev/null
@@ -1,26 +0,0 @@
-"use strict";
-
-XPCOMUtils.defineLazyModuleGetter(this, "OS",
-                                  "resource://gre/modules/osfile.jsm");
-
-let tmpFile = FileUtils.getDir("TmpD", [], true);
-let dbConn;
-
-add_task(async function setup() {
-  tmpFile.append("TestDB");
-  dbConn = await Sqlite.openConnection({ path: tmpFile.path });
-
-  do_register_cleanup(() => {
-    dbConn.close();
-    OS.File.remove(tmpFile.path);
-  });
-});
-
-add_task(async function testgetRowsFromDBWithoutLocksRetries() {
-  let promise = MigrationUtils.getRowsFromDBWithoutLocks(tmpFile.path,
-                                                         "Temp DB",
-                                                         "SELECT * FROM moz_temp_table")
-  await new Promise(resolve => do_timeout(50, resolve));
-  dbConn.execute("CREATE TABLE moz_temp_table (id INTEGER PRIMARY KEY)");
-  await promise;
-});
diff --git a/browser/components/migration/tests/unit/xpcshell.ini b/browser/components/migration/tests/unit/xpcshell.ini
index 4fc70386220b..67ee7c1db5d3 100644
--- a/browser/components/migration/tests/unit/xpcshell.ini
+++ b/browser/components/migration/tests/unit/xpcshell.ini
@@ -23,6 +23,5 @@ skip-if = !(os == "win" && bits == 64) # bug 1392396
 skip-if = os != "win"
 [test_IE7_passwords.js]
 skip-if = os != "win"
-[test_MigrationUtils_timedRetry.js]
 [test_Safari_bookmarks.js]
 skip-if = os != "mac"