diff --git a/anoncreds/tests/anoncreds_demos.rs b/anoncreds/tests/anoncreds_demos.rs
index 0816794f..61ad6ae1 100644
--- a/anoncreds/tests/anoncreds_demos.rs
+++ b/anoncreds/tests/anoncreds_demos.rs
@@ -13,10 +13,10 @@ use self::utils::anoncreds::{IssuerWallet, ProverWallet};
 
 mod utils;
 
-pub static GVT_SCHEMA_NAME: &'static str = "gvt";
-pub static GVT_SCHEMA_ATTRIBUTES: &[&'static str; 4] = &["name", "age", "sex", "height"];
 pub static SCHEMA_ID: &str = "mock:uri";
 pub static CRED_DEF_ID: &str = "mock:uri";
+pub const GVT_SCHEMA_NAME: &str = "gvt";
+pub const GVT_SCHEMA_ATTRIBUTES: &[&str; 4] = &["name", "age", "sex", "height"];
 
 #[test]
 fn anoncreds_works_for_single_issuer_single_prover() {
@@ -31,7 +31,6 @@ fn anoncreds_works_for_single_issuer_single_prover() {
         GVT_SCHEMA_NAME,
         "1.0",
         GVT_SCHEMA_ATTRIBUTES[..].into(),
-        None,
     )
     .expect("Error creating gvt schema for issuer");