diff --git a/src/_pytest/python_api.py b/src/_pytest/python_api.py
index 6d2828a64..5331d8a84 100644
--- a/src/_pytest/python_api.py
+++ b/src/_pytest/python_api.py
@@ -211,7 +211,7 @@ class ApproxScalar(ApproxBase):
         the pre-specified tolerance.
         """
         if _is_numpy_array(actual):
-            return all(a == self for a in actual)
+            return all(a == self for a in actual.flat)
 
         # Short-circuit exact equality.
         if actual == self.expected: