diff --git a/tests/data/summary_deck_non_constant_porosity.DATA b/tests/data/SUMMARY_DECK_NON_CONSTANT_POROSITY.DATA
similarity index 100%
rename from tests/data/summary_deck_non_constant_porosity.DATA
rename to tests/data/SUMMARY_DECK_NON_CONSTANT_POROSITY.DATA
diff --git a/tests/test_ecl_output.cc b/tests/test_ecl_output.cc
index 2aa86fec8..3d4c24503 100644
--- a/tests/test_ecl_output.cc
+++ b/tests/test_ecl_output.cc
@@ -111,8 +111,8 @@ ERT::ert_unique_ptr< ecl_sum_type, ecl_sum_free > readsum( const std::string& ba
 void test_summary()
 {
     typedef typename TTAG(TestEclOutputTypeTag) TypeTag;
-    const std::string filename = "data/summary_deck_non_constant_porosity.DATA";
-    const std::string casename = "summary_deck_non_constant_porosity";
+    const std::string filename = "data/SUMMARY_DECK_NON_CONSTANT_POROSITY.DATA";
+    const std::string casename = "data/SUMMARY_DECK_NON_CONSTANT_POROSITY";
 
     auto simulator = initSimulator<TypeTag>(filename.data());
     typedef typename GET_PROP_TYPE(TypeTag, Vanguard) Vanguard;