diff --git a/bindings/python/tests/__init__.py b/bindings/python/tests/__init__.py
index 0a2e9ac..b4b7391 100644
--- a/bindings/python/tests/__init__.py
+++ b/bindings/python/tests/__init__.py
@@ -55,7 +55,7 @@ EXPECTED_SQRT_EUCLID_DIS = [14.0, 2030.4756, 3.0]
 OP_NEG_DOT_PROD_DIS = [1, 2, 4]
 EXPECTED_NEG_DOT_PROD_DIS = [-17.0, 80.64, -7.0]
 OP_NEG_COS_DIS = [3, 2, 1]
-EXPECTED_NEG_COS_DIS = [-0.7142857, 0.5199225, -0.92582005]
+EXPECTED_NEG_COS_DIS = [0.28571427, 1.5199225, 0.07417989]
 
 # ==== test_delete ====
 LEN_AFT_DEL = 2