diff --git a/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb b/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
index 54c7440f05c7..2f9ea6c80195 100644
--- a/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
@@ -24,15 +24,15 @@ def setup
       end
 
       def test_bad_connection
-        dir = "/tmp/should/_exist/"
-        FileUtils.mkdir_p dir
-        File.chmod(0x000, dir)
-        db_path = File.join(dir, "db/cant-be-created.db")
-        error = assert_raise ActiveRecord::NoDatabaseError do
-          connection = SQLite3Adapter.new(adapter: "sqlite3", database: db_path)
-          connection.drop_table "ex", if_exists: true
+        Dir.mktmpdir do |dir|
+          File.chmod(0x000, dir)
+          db_path = File.join(dir, "db/cant-be-created.db")
+          error = assert_raise ActiveRecord::NoDatabaseError do
+            connection = SQLite3Adapter.new(adapter: "sqlite3", database: db_path)
+            connection.drop_table "ex", if_exists: true
+          end
+          assert_kind_of ActiveRecord::ConnectionAdapters::NullPool, error.connection_pool
         end
-        assert_kind_of ActiveRecord::ConnectionAdapters::NullPool, error.connection_pool
       end
 
       def test_database_should_get_created_when_missing_parent_directories_for_database_path