diff --git a/p521/src/lib.rs b/p521/src/lib.rs
index a86043de..83a61a5c 100644
--- a/p521/src/lib.rs
+++ b/p521/src/lib.rs
@@ -16,7 +16,7 @@
 )]
 
 #[cfg(feature = "arithmetic")]
-pub mod arithmetic;
+mod arithmetic;
 
 #[cfg(feature = "ecdh")]
 pub mod ecdh;
diff --git a/p521/tests/projective.rs b/p521/tests/projective.rs
index 0c1bb203..4e0ebfac 100644
--- a/p521/tests/projective.rs
+++ b/p521/tests/projective.rs
@@ -7,8 +7,8 @@ use elliptic_curve::{
     sec1::{self, ToEncodedPoint},
 };
 use p521::{
-    arithmetic::{AffinePoint, ProjectivePoint, Scalar},
     test_vectors::group::{ADD_TEST_VECTORS, MUL_TEST_VECTORS},
+    AffinePoint, ProjectivePoint, Scalar,
 };
 use primeorder::{impl_projective_arithmetic_tests, Double};