diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0a7cab2..81f0c40 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,18 +21,18 @@ jobs:
       matrix:
         target:
           - triple: aarch64-unknown-linux-gnu
-            feature: +neon
+            feature: neon
           - triple: i686-unknown-linux-gnu
-            feature: +avx2
+            feature: avx2
           - triple: x86_64-unknown-linux-gnu
-            feature: +avx2
+            feature: avx2
           - triple: wasm32-wasip1
-            feature: +simd128
+            feature: simd128
         rust: [nightly, stable, 1.64]
         exclude:
           - target:
               triple: wasm32-wasip1
-              feature: +simd128
+              feature: simd128
             rust: 1.64
     timeout-minutes: 30
     steps:
@@ -50,7 +50,7 @@ jobs:
         if: matrix.rust == 'nightly'
 
       - name: Enable target feature
-        run: echo RUSTFLAGS=${RUSTFLAGS}\ -Ctarget-feature=${{ matrix.target.feature }} >> $GITHUB_ENV
+        run: echo RUSTFLAGS=${RUSTFLAGS}\ -Ctarget-feature=+${{ matrix.target.feature }} >> $GITHUB_ENV
 
       - uses: Swatinem/rust-cache@v2
 
@@ -64,6 +64,19 @@ jobs:
       - run: cargo bench --no-run
         if: matrix.rust == 'nightly'
 
+      - name: Disable target feature
+        run: echo RUSTFLAGS=${RUSTFLAGS}\ -Ctarget-feature=-${{ matrix.target.feature }} >> $GITHUB_ENV
+
+      - run: cargo build
+      - run: cargo build --no-default-features
+      - run: cargo test
+      - run: cargo test --no-default-features
+      - run: cargo test --no-default-features --features force-generic
+      - run: cargo test --no-default-features --features nightly,portable-simd
+        if: matrix.rust == 'nightly'
+      - run: cargo bench --no-run
+        if: matrix.rust == 'nightly'
+
   miri:
     name: Miri
     runs-on: ubuntu-latest
diff --git a/tests/test.rs b/tests/test.rs
index 9bef1a9..c779f0e 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -114,7 +114,7 @@ fn decode_upper() {
 #[cfg(feature = "alloc")]
 fn decode_long() {
     let s = "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";
-    let _ = const_hex::check(s).unwrap();
+    const_hex::check(s).unwrap();
     assert_eq!(const_hex::decode(s).unwrap(), hex::decode(s).unwrap());
 }