diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2a7bf850c08..f66071db0c5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -52,7 +52,7 @@ jobs:
       - name: Install clippy
         run: rustup component add clippy
       - name: "clippy --all"
-        run: cargo clippy --all --tests
+        run: cargo clippy --all --tests -- -D warnings
 
   fmt:
     name: fmt
@@ -64,8 +64,8 @@ jobs:
       - uses: Swatinem/rust-cache@v1
       - name: Install rustfmt
         run: rustup component add rustfmt
-
-      - run: cargo fmt
+      - name: Run
+        run: cargo fmt --all -- --check
 
   miri-checks:
     name: Miri
diff --git a/src/datatypes/mod.rs b/src/datatypes/mod.rs
index d8fbabe1e3d..b99d76c976a 100644
--- a/src/datatypes/mod.rs
+++ b/src/datatypes/mod.rs
@@ -8,7 +8,7 @@ pub use field::Field;
 pub use physical_type::*;
 pub use schema::Schema;
 
-pub(crate) use field::{get_extension, Extension, Metadata};
+pub(crate) use field::{Extension, Metadata};
 
 /// The set of supported logical types.
 /// Each variant uniquely identifies a logical type, which define specific semantics to the data (e.g. how it should be represented).