diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e2260f7..82f49dc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,6 +31,8 @@ jobs:
         run: LITHIUM_BACKEND=panic cargo test --target ${{ matrix.arch }}-unknown-linux-${{ matrix.libc }}
       - name: Test with Itanium backend
         run: LITHIUM_BACKEND=itanium cargo test --target ${{ matrix.arch }}-unknown-linux-${{ matrix.libc }}
+      - name: Test without std
+        run: cargo test --target ${{ matrix.arch }}-unknown-linux-${{ matrix.libc }} --no-default-features
 
   linux-cross:
     runs-on: ubuntu-latest
@@ -69,6 +71,8 @@ jobs:
         run: LITHIUM_BACKEND=panic cross test --target ${{ matrix.target }}
       - name: Test with Itanium backend
         run: LITHIUM_BACKEND=itanium cross test --target ${{ matrix.target }}
+      - name: Test without std
+        run: cargo test --target ${{ matrix.target }} --no-default-features
 
   darwin:
     runs-on: ${{ matrix.os }}
@@ -88,6 +92,8 @@ jobs:
         run: LITHIUM_BACKEND=panic cargo test
       - name: Test with Itanium backend
         run: LITHIUM_BACKEND=itanium cargo test
+      - name: Test without std
+        run: cargo test
 
   windows:
     runs-on: windows-latest
@@ -112,6 +118,8 @@ jobs:
       - name: Test with Itanium backend
         if: matrix.abi == 'gnu'
         run: set LITHIUM_BACKEND=itanium && cargo test
+      - name: Test without std
+        run: cargo test --no-default-features
 
   miri-linux:
     runs-on: ubuntu-latest
@@ -136,6 +144,8 @@ jobs:
         run: LITHIUM_BACKEND=panic cargo miri test --target ${{ matrix.target }}
       - name: Test with Itanium backend
         run: LITHIUM_BACKEND=itanium cargo miri test --target ${{ matrix.target }}
+      - name: Test without std
+        run: cargo miri test --target ${{ matrix.target }} --no-default-features
 
   valgrind:
     runs-on: ubuntu-latest
@@ -151,8 +161,10 @@ jobs:
         run: LITHIUM_BACKEND=panic cargo valgrind test
       - name: Test with Itanium backend
         run: LITHIUM_BACKEND=itanium cargo valgrind test
+      - name: Test without std
+        run: cargo valgrind test --no-default-features
 
-  test_stable:
+  test-stable:
     runs-on: ubuntu-latest
     if: success() || failure()
     steps:
@@ -180,3 +192,5 @@ jobs:
         run: LITHIUM_BACKEND=${{ matrix.backend }} cargo fmt -- --check
       - name: Clippy
         run: LITHIUM_BACKEND=${{ matrix.backend }} cargo clippy -- -D warnings
+      - name: Clippy without std
+        run: LITHIUM_BACKEND=${{ matrix.backend }} cargo clippy --no-default-features -- -D warnings
diff --git a/src/lib.rs b/src/lib.rs
index defa3c4..f45315f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -147,6 +147,9 @@
 
 extern crate alloc;
 
+#[cfg(test)]
+extern crate std;
+
 mod api;
 mod backend;