diff --git a/py/modmath.c b/py/modmath.c
index 72b5dde517..861a23b48b 100644
--- a/py/modmath.c
+++ b/py/modmath.c
@@ -54,7 +54,7 @@ STATIC mp_obj_t math_generic_2(mp_obj_t x_obj, mp_obj_t y_obj, mp_float_t (*f)(m
     mp_float_t x = mp_obj_get_float(x_obj);
     mp_float_t y = mp_obj_get_float(y_obj);
     mp_float_t ans = f(x, y);
-    if ((isnan(ans) && !isnan(x) && !isnan(y)) || (isinf(ans) && !isinf(x))) {
+    if ((isnan(ans) && !isnan(x) && !isnan(y)) || (isinf(ans) && !isinf(x) && !isinf(y))) {
         math_error();
     }
     return mp_obj_new_float(ans);
diff --git a/tests/float/math_domain.py b/tests/float/math_domain.py
index 063d509b59..606a655284 100644
--- a/tests/float/math_domain.py
+++ b/tests/float/math_domain.py
@@ -39,7 +39,26 @@ for name, f, args in (
 
 # double argument functions
 for name, f, args in (
-    ("pow", math.pow, ((0, 2), (-1, 2), (0, -1), (-1, 2.3), (nan, 0), (1, nan))),
+    (
+        "pow",
+        math.pow,
+        (
+            (0, 2),
+            (-1, 2),
+            (0, -1),
+            (-1, 2.3),
+            (0.5, inf),
+            (-0.5, inf),
+            (0.5, -inf),
+            (-0.5, -inf),
+            (1.5, inf),
+            (-1.5, inf),
+            (1.5, -inf),
+            (-1.5, -inf),
+            (nan, 0),
+            (1, nan),
+        ),
+    ),
     ("log", math.log, ()),
     ("fmod", math.fmod, ((1.2, inf), (1.2, -inf), (1.2, 0), (inf, 1.2))),
     ("atan2", math.atan2, ((0, 0), (-inf, inf), (-inf, -inf), (inf, -inf))),