diff --git a/RecoTracker/PixelSeeding/plugins/alpaka/BrokenLineFit.dev.cc b/RecoTracker/PixelSeeding/plugins/alpaka/BrokenLineFit.dev.cc
index dfb413f1e9258..f8cadf653114d 100644
--- a/RecoTracker/PixelSeeding/plugins/alpaka/BrokenLineFit.dev.cc
+++ b/RecoTracker/PixelSeeding/plugins/alpaka/BrokenLineFit.dev.cc
@@ -159,11 +159,13 @@ namespace ALPAKA_ACCELERATOR_NAMESPACE {
         }
         brokenline::fastFit(acc, hits, fast_fit);
 
-        // no NaN here....
-        ALPAKA_ASSERT_ACC(fast_fit(0) == fast_fit(0));
-        ALPAKA_ASSERT_ACC(fast_fit(1) == fast_fit(1));
-        ALPAKA_ASSERT_ACC(fast_fit(2) == fast_fit(2));
-        ALPAKA_ASSERT_ACC(fast_fit(3) == fast_fit(3));
+#ifdef BROKENLINE_DEBUG
+        // any NaN value should cause the track to be rejected at a later stage
+        ALPAKA_ASSERT_ACC(not alpaka::math::isnan(acc, fast_fit(0)));
+        ALPAKA_ASSERT_ACC(not alpaka::math::isnan(acc, fast_fit(1)));
+        ALPAKA_ASSERT_ACC(not alpaka::math::isnan(acc, fast_fit(2)));
+        ALPAKA_ASSERT_ACC(not alpaka::math::isnan(acc, fast_fit(3)));
+#endif
       }
     }
   };
diff --git a/RecoTracker/PixelSeeding/plugins/alpaka/RiemannFit.dev.cc b/RecoTracker/PixelSeeding/plugins/alpaka/RiemannFit.dev.cc
index c6b7af5bccf67..3e6f6e9c8ed98 100644
--- a/RecoTracker/PixelSeeding/plugins/alpaka/RiemannFit.dev.cc
+++ b/RecoTracker/PixelSeeding/plugins/alpaka/RiemannFit.dev.cc
@@ -81,11 +81,13 @@ namespace ALPAKA_ACCELERATOR_NAMESPACE {
         }
         riemannFit::fastFit(acc, hits, fast_fit);
 
-        // no NaN here....
-        ALPAKA_ASSERT_ACC(fast_fit(0) == fast_fit(0));
-        ALPAKA_ASSERT_ACC(fast_fit(1) == fast_fit(1));
-        ALPAKA_ASSERT_ACC(fast_fit(2) == fast_fit(2));
-        ALPAKA_ASSERT_ACC(fast_fit(3) == fast_fit(3));
+#ifdef RIEMANN_DEBUG
+        // any NaN value should cause the track to be rejected at a later stage
+        ALPAKA_ASSERT_ACC(not alpaka::math::isnan(acc, fast_fit(0)));
+        ALPAKA_ASSERT_ACC(not alpaka::math::isnan(acc, fast_fit(1)));
+        ALPAKA_ASSERT_ACC(not alpaka::math::isnan(acc, fast_fit(2)));
+        ALPAKA_ASSERT_ACC(not alpaka::math::isnan(acc, fast_fit(3)));
+#endif
       }
     }
   };