diff --git a/Test/Vector.hs b/Test/Vector.hs
index 60c989a..c8b1e1d 100644
--- a/Test/Vector.hs
+++ b/Test/Vector.hs
@@ -79,4 +79,4 @@ getAngleProp5 (Positive (R2 x1 _)) (Positive (R2 _ y2))
 
 getAngleProp6 :: Positive Vec -> Positive Vec -> Bool
 getAngleProp6 (Positive (R2 _ y1)) (Positive (R2 x2 _))
-  = getAngle (R2 x2 0) (R2 0 y1) == pi / 2
+  = getAngle (R2 0 y1) (R2 x2 0) == pi / 2