diff --git a/core/modules/migrate/tests/src/Kernel/SqlSourceTest.php b/core/modules/migrate/tests/src/Kernel/SqlSourceTest.php
index 106e5a8..8996bba 100644
--- a/core/modules/migrate/tests/src/Kernel/SqlSourceTest.php
+++ b/core/modules/migrate/tests/src/Kernel/SqlSourceTest.php
@@ -36,7 +36,7 @@ public function testPrepareQuery() {
     // before we run the migration to reflect the number of items to be
     // migrated. After the migration run, this method would return only records
     // that need update.
-    $count = $source = $migration->getSourcePlugin()->count();
+    $count = $migration->getSourcePlugin()->count();
 
     // Run the migration.
     (new MigrateExecutable($migration, new MigrateMessage()))->import();