diff --git a/src/test/test_devbugs.py b/src/test/test_devbugs.py
index ea31802..80a607e 100644
--- a/src/test/test_devbugs.py
+++ b/src/test/test_devbugs.py
@@ -83,9 +83,13 @@ def test_bug_git52(self):
             T = 500
             h = sub.h(T=T, p=p)
             s = sub.s(T=T, p=p)
+            assert sub.T_s(s, p) == approx(sub.T_s(s, p=p))
             assert sub.T_s(s, p) == approx(sub.T_s(s=s, p=p))
+            assert sub.T_h(h, p) == approx(sub.T_h(h, p=p))
             assert sub.T_h(h, p) == approx(sub.T_h(h=h, p=p))
             if hasattr(sub, "p_s"):
+                assert sub.p_s(s, T) == approx(sub.p_s(s, T=T))
                 assert sub.p_s(s, T) == approx(sub.p_s(s=s, T=T))
             if hasattr(sub, "d_s"):
+                assert sub.d_s(s, T) == approx(sub.d_s(s, T=T))
                 assert sub.d_s(s, T) == approx(sub.d_s(s=s, T=T))