diff --git a/Tests/UnitTests/Core/TrackFitting/Gx2fTests.cpp b/Tests/UnitTests/Core/TrackFitting/Gx2fTests.cpp
index 6b48cb701d8..8272ec633af 100644
--- a/Tests/UnitTests/Core/TrackFitting/Gx2fTests.cpp
+++ b/Tests/UnitTests/Core/TrackFitting/Gx2fTests.cpp
@@ -292,7 +292,7 @@ BOOST_AUTO_TEST_CASE(NoFit) {
   BOOST_CHECK(track.hasReferenceSurface());
 
   // Track quantities
-  BOOST_CHECK_EQUAL(track.chi2(), 0.);
+  BOOST_CHECK(std::isinf(track.chi2()));
   BOOST_CHECK_EQUAL(track.nDoF(), 0u);
   BOOST_CHECK_EQUAL(track.nHoles(), 0u);
   BOOST_CHECK_EQUAL(track.nMeasurements(), 0u);