diff --git a/tests/collocation_common.hpp b/tests/collocation_common.hpp
index a59ab07c..4e212101 100644
--- a/tests/collocation_common.hpp
+++ b/tests/collocation_common.hpp
@@ -22,7 +22,6 @@
 using namespace GauXC;
 
 #define MAX_NPTS_CHECK 67
-#define REF_COLLOCATION_DATA_DEFINED  // Guard for hdf5_test_serialization_impl.hpp
 
 struct ref_collocation_data {
   std::vector<int32_t>              mask;
diff --git a/tests/hdf5_test_serialization_impl.hpp b/tests/hdf5_test_serialization_impl.hpp
index 5f1d4d30..99a0c70d 100644
--- a/tests/hdf5_test_serialization_impl.hpp
+++ b/tests/hdf5_test_serialization_impl.hpp
@@ -11,12 +11,7 @@
  */
 #pragma once
 
-// This file contains implementations for HDF5 serialization of test data structures
-// Must include struct definitions before this file
-#ifndef REF_COLLOCATION_DATA_DEFINED
-#error "collocation_common.hpp must be included before hdf5_test_serialization_impl.hpp"
-#endif
-
+#include "collocation_common.hpp"
 #include "hdf5_test_serialization.hpp"
 
 namespace GauXC {