diff --git a/tests/MnistDatabase.hpp b/tests/MnistDatabase.hpp
index 281b708..b1336bc 100644
--- a/tests/MnistDatabase.hpp
+++ b/tests/MnistDatabase.hpp
@@ -12,7 +12,8 @@
 class MnistDatabase
 {
 public:
-    using TTestCaseData = ClassifierTestCaseData<float>;
+    using DataType = float;
+    using TTestCaseData = ClassifierTestCaseData<DataType>;
 
     explicit MnistDatabase(const std::string& binaryFileDirectory, bool scaleValues = false);
     std::unique_ptr<TTestCaseData> GetTestCaseData(unsigned int testCaseId);