diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f81113c1..2d447919 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -225,7 +225,9 @@ jobs:
 
       - name: Test ${{ matrix.contract }} on ${{ matrix.platform }}-${{ matrix.toolchain }}
         if: runner.os != 'Windows' && matrix.contract == 'static-buffer'
-        run: INK_STATIC_BUFFER_SIZE=30 cargo test --verbose --manifest-path=${{ matrix.contract }}/Cargo.toml;
+        run: |
+          cargo clean --manifest-path --manifest-path=${{ matrix.contract }}/Cargo.toml
+          INK_STATIC_BUFFER_SIZE=30 cargo test --verbose --manifest-path=${{ matrix.contract }}/Cargo.toml
 
       - name: Build workspace ${{ matrix.contract }} on ${{ matrix.platform }}-${{ matrix.toolchain }}
         if: runner.os != 'Windows' && matrix.contract == 'workspace-contracts'