diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 21447c4..a15ccdc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,7 +50,7 @@ jobs:
     - name: Build
       run: cargo test --workspace --no-run
     - name: Test
-      run: cargo hack test --feature-powerset --workspace
+      run: cargo hack test --feature-powerset --exclude-features strict_unstable --workspace
   msrv:
     name: "Check MSRV"
     runs-on: ubuntu-latest
@@ -64,7 +64,7 @@ jobs:
     - uses: Swatinem/rust-cache@v2
     - uses: taiki-e/install-action@cargo-hack
     - name: Default features
-      run: cargo hack check --feature-powerset --locked --rust-version --ignore-private --workspace --all-targets
+      run: cargo hack check --feature-powerset --exclude-features strict_unstable --locked --rust-version --ignore-private --workspace --all-targets
   lockfile:
     runs-on: ubuntu-latest
     steps:
diff --git a/.github/workflows/rust-next.yml b/.github/workflows/rust-next.yml
index 17da987..d8bdaac 100644
--- a/.github/workflows/rust-next.yml
+++ b/.github/workflows/rust-next.yml
@@ -40,7 +40,7 @@ jobs:
     - name: Build
       run: cargo test --workspace --no-run
     - name: Test
-      run: cargo hack test --feature-powerset --workspace
+      run: cargo hack test --feature-powerset --exclude-features strict_unstable --workspace
   latest:
     name: "Check latest dependencies"
     runs-on: ubuntu-latest
@@ -58,4 +58,4 @@ jobs:
     - name: Build
       run: cargo test --workspace --no-run
     - name: Test
-      run: cargo hack test --feature-powerset --workspace
+      run: cargo hack test --feature-powerset --exclude-features strict_unstable --workspace
diff --git a/src/build.rs b/src/build.rs
index 4f780d6..4dbf4ee 100644
--- a/src/build.rs
+++ b/src/build.rs
@@ -349,7 +349,7 @@ impl CargoBuild {
     /// println!("artifact={}", run.path().display());
     /// ```
     #[cfg(feature = "test_unstable")]
-    pub fn run_tests(self) -> CargoResult<impl Iterator<Item = Result<CargoTest, CargoError>>> {
+    pub fn run_tests(self) -> CargoResult<impl Iterator<Item = CargoResult<CargoTest>>> {
         let msgs = CommandMessages::with_command(self.cmd)?;
         Ok(CargoTest::with_messages(msgs))
     }