diff --git a/lib/matplotlib/lines.py b/lib/matplotlib/lines.py
index 5a7c83ccbc06..65a4ccb6d950 100644
--- a/lib/matplotlib/lines.py
+++ b/lib/matplotlib/lines.py
@@ -1506,8 +1506,8 @@ def get_transform(self):
points_transform.transform([self._xy1, self._xy2])
dx = x2 - x1
dy = y2 - y1
- if np.allclose(x1, x2):
- if np.allclose(y1, y2):
+ if dx == 0:
+ if dy == 0:
raise ValueError(
f"Cannot draw a line through two identical points "
f"(x={(x1, x2)}, y={(y1, y2)})")
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