diff --git a/src/utils/first/builder.rs b/src/utils/first/builder.rs
index 8a12ef8..5891a3c 100644
--- a/src/utils/first/builder.rs
+++ b/src/utils/first/builder.rs
@@ -201,6 +201,7 @@ impl<'grammar> FirstBuilder<'grammar> {
     }
 }
 
+#[cfg(test)]
 mod tests {
     use crate::utils::first::builder::FirstBuilder;
     use bnf::Term;
diff --git a/src/utils/follow/builder.rs b/src/utils/follow/builder.rs
index 81d4929..ce057f8 100644
--- a/src/utils/follow/builder.rs
+++ b/src/utils/follow/builder.rs
@@ -177,8 +177,8 @@ mod tests {
     use crate::utils::follow::builder::FollowBuilder;
     use crate::utils::follow::Follow;
     use bnf::{Grammar, Term};
-    use std::collections::{HashMap, HashSet};
-    use std::ops::BitAnd;
+    use std::collections::HashSet;
+
     use std::str::FromStr;
 
     pub fn grammar() -> Grammar {