diff --git a/.github/workflows/_checks.yml b/.github/workflows/_checks.yml
index e851997..f466187 100644
--- a/.github/workflows/_checks.yml
+++ b/.github/workflows/_checks.yml
@@ -94,10 +94,10 @@ jobs:
           cache-dependency-glob: "**/pyproject.toml"
       - run: uv python install ${{ matrix.python-version }}
       - run: uv python pin ${{ matrix.python-version }}
-      # --no-build: a floor with no wheel for this interpreter must fail here rather
-      # than quietly compile its sdist. Without it the leg passes on a floor that
-      # still breaks anyone installing into an image with no build toolchain.
-      - run: uv sync --all-extras --no-install-project --resolution lowest-direct --no-build
+      - run: uv venv
+      # Pinned with builds allowed, so a floor with no wheel fails the wheel-only install below.
+      - run: uv pip compile pyproject.toml --all-extras --no-deps --resolution lowest-direct -o floors.txt
+      - run: uv pip install -r pyproject.toml --all-extras --group dev --constraints floors.txt --no-build
       # --no-cov: the coverage gate rides the resolved-highest leg in `test-ci`. This
       # one asks whether the floors work, which a coverage failure would only obscure.
       - run: uv run --no-sync pytest . --no-cov
diff --git a/pyproject.toml b/pyproject.toml
index e8daa6a..834b4e8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,8 +41,6 @@ Changelog = "https://github.com/modern-python/faststream-concurrent-aiokafka/rel
 
 [dependency-groups]
 dev = [
-    # Floored so `uv sync --resolution lowest-direct` resolves a usable harness: an
-    # unbounded name there resolves to the project's first-ever release.
     "pytest>=8",
     "pytest-cov>=5",
     "pytest-xdist>=3",