diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 17efc9c..5b9c9f5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -67,6 +67,10 @@ jobs:
       - name: Install dependencies
         if: matrix.install_deps
         run: ${{ matrix.install_deps }}
+      - name: Cargo deps locks
+        if: ${{ matrix.rust == '1.41.1' }}
+        run:
+          cargo update -p either --precise 1.13.0
       - name: Tests
         run: |
           rustc -C target-cpu=native --print cfg
@@ -138,11 +142,7 @@ jobs:
           profile: minimal
           targets: ${{ matrix.target }}
       - name: Cache cargo plugins
-        id: cache
-        uses: actions/cache@v1
-        with:
-          path: ~/.cargo/bin/
-          key: ${{ runner.os }}-cargo-plugins
+        uses: Swatinem/rust-cache@v2
       - name: Install cross
         if: steps.cache.outputs.cache-hit != 'true'
         run: cargo install cross
diff --git a/examples/usegemm.rs b/examples/usegemm.rs
index efae1df..e837f1c 100644
--- a/examples/usegemm.rs
+++ b/examples/usegemm.rs
@@ -21,7 +21,6 @@ use core::fmt::{Display, Debug};
 
 trait Float : Copy + Display + Debug + PartialEq {
     fn zero() -> Self;
-    fn one() -> Self;
     fn from(x: i64) -> Self;
     fn nan() -> Self;
     fn is_nan(self) -> bool;
@@ -29,7 +28,6 @@ trait Float : Copy + Display + Debug + PartialEq {
 
 impl Float for f32 {
     fn zero() -> Self { 0. }
-    fn one() -> Self { 1. }
     fn from(x: i64) -> Self { x as Self }
     fn nan() -> Self { 0./0. }
     fn is_nan(self) -> bool { self.is_nan() }
@@ -37,7 +35,6 @@ impl Float for f32 {
 
 impl Float for f64 {
     fn zero() -> Self { 0. }
-    fn one() -> Self { 1. }
     fn from(x: i64) -> Self { x as Self }
     fn nan() -> Self { 0./0. }
     fn is_nan(self) -> bool { self.is_nan() }
diff --git a/src/debugmacros.rs b/src/debugmacros.rs
index 2ce62ff..f973fdb 100644
--- a/src/debugmacros.rs
+++ b/src/debugmacros.rs
@@ -13,14 +13,14 @@ macro_rules! dprint {
     }
 }
 
-#[cfg(feature = "use_debug")]
+/*
 macro_rules! debug {
     ($e:expr) => {
         $e;
     }
 }
+*/
 
-#[cfg(not(feature = "use_debug"))]
 macro_rules! debug {
     ($e:expr) => {
     }
diff --git a/src/kernel.rs b/src/kernel.rs
index e82a2cb..66fb910 100644
--- a/src/kernel.rs
+++ b/src/kernel.rs
@@ -94,6 +94,7 @@ pub(crate) trait GemmKernel {
 pub(crate) trait Element : Copy + Send + Sync {
     fn zero() -> Self;
     fn one() -> Self;
+    #[cfg_attr(not(test), allow(unused))]
     fn test_value() -> Self;
     fn is_zero(&self) -> bool;
     fn add_assign(&mut self, rhs: Self);