diff --git a/tests/st/scipy_st/utils.py b/tests/st/scipy_st/utils.py
index 71166aca23d..73e2f935cc5 100644
--- a/tests/st/scipy_st/utils.py
+++ b/tests/st/scipy_st/utils.py
@@ -94,8 +94,8 @@ def create_sym_pos_matrix(shape, dtype):
             'Symmetric positive definite matrix must be a square matrix, but has shape: ', shape)
 
     n = shape[-1]
-    a = (onp.random.random(shape) + onp.eye(n)).astype(dtype)
-    return onp.dot(a, a.T)
+    x = onp.random.random(shape)
+    return (onp.matmul(x, x.T) + onp.eye(n)).astype(dtype)
 
 
 def gradient_check(x, net, epsilon=1e-3, enumerate_fn=onp.ndenumerate):