diff --git a/test/thermo/phaseConstructors.cpp b/test/thermo/phaseConstructors.cpp
index f732098a0..bffcae0b8 100644
--- a/test/thermo/phaseConstructors.cpp
+++ b/test/thermo/phaseConstructors.cpp
@@ -160,7 +160,7 @@ class CtiConversionTest : public testing::Test
 {
 public:
     CtiConversionTest() {
-        appdelete();
+        close_XML_File("all");
     }
 
     std::unique_ptr<ThermoPhase> p1;