diff --git a/test/test_transaction.cpp b/test/test_transaction.cpp
index 9e744ff3e7b9910a7a89421b96ab907a48c2d0fb..30118d129700d6c972883cc253c76faec5f641b2 100644
--- a/test/test_transaction.cpp
+++ b/test/test_transaction.cpp
@@ -28,14 +28,14 @@
 #include "caosdb/transaction.h"                   // for Entity, Transaction
 #include "caosdb/transaction_status.h"            // for TransactionStatus
 #include "caosdb/value.h"                         // for Value
-#include <gtest/gtest-message.h>                  // for Message
-#include <gtest/gtest-test-part.h>                // for TestPartResult
-#include <gtest/gtest_pred_impl.h>                // for AssertionResult
-#include <stddef.h>                               // for size_t
 #include <boost/filesystem/operations.hpp>        // for remove
 #include <boost/filesystem/path.hpp>              // for path
 #include <boost/filesystem/path_traits.hpp>       // for filesystem
+#include <cstddef>                                // for size_t
 #include <cstdint>                                // for int32_t
+#include <gtest/gtest-message.h>                  // for Message
+#include <gtest/gtest-test-part.h>                // for TestPartResult
+#include <gtest/gtest_pred_impl.h>                // for AssertionResult
 #include <iostream>                               // for operator<<, endl
 #include <limits>                                 // for numeric_limits
 #include <memory>                                 // for unique_ptr, allocator