Fix testExportFailsWhenSharedUserDefaultsNil

Author: kean

WordPress/WordPressTest/DataMigratorTests.swift

@@ -69,7 +69,13 @@ class DataMigratorTests: XCTestCase {
 
     func testExportFailsWhenSharedUserDefaultsNil() {
         // Given
-        migrator = DataMigrator(coreDataStack: coreDataStack, backupLocation: nil, keychainUtils: keychainUtils, sharedDefaults: nil, appGroupName: appGroupName)
+        migrator = DataMigrator(
+            coreDataStack: coreDataStack,
+            backupLocation: URL(string: "/dev/null"),
+            keychainUtils: keychainUtils,
+            sharedDefaults: nil,
+            appGroupName: appGroupName
+        )
 
         // When
         let migratorError = getExportDataMigratorError(migrator)