diff --git a/src/field.rs b/src/field.rs
index f3c3320..e154f24 100644
--- a/src/field.rs
+++ b/src/field.rs
@@ -280,7 +280,7 @@ mod test {
     /// Random element a of GF(2^255-19), from Sage
     /// a = 1070314506888354081329385823235218444233221\
     ///     2228051251926706380353716438957572
-    pub static A_BYTES: [u8; 32] =
+    static A_BYTES: [u8; 32] =
         [ 0x04, 0xfe, 0xdf, 0x98, 0xa7, 0xfa, 0x0a, 0x68,
           0x84, 0x92, 0xbd, 0x59, 0x08, 0x07, 0xa7, 0x03,
           0x9e, 0xd1, 0xf6, 0xf2, 0xe1, 0xd9, 0xe2, 0xa4,