diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ea2ae9a..221ff22 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -53,12 +53,28 @@ jobs:
 
       - name: Configure
         run: |
+          set -o pipefail
           cmake -B build \
             -DFRAMEWRIGHT_BUILD_TESTS=ON \
             -DFRAMEWRIGHT_BUILD_EXAMPLES=ON \
             -DFRAMEWRIGHT_BUILD_PYTHON=ON \
             -Dpybind11_DIR=$(python3 -c "import pybind11; print(pybind11.get_cmake_dir())") \
-            -DCMAKE_BUILD_TYPE=Release
+            -DCMAKE_BUILD_TYPE=Release 2>&1 | tee configure.log
+
+      # Every test fixture is generated by ffmpeg at configure time, and the
+      # test cases that use them are #ifdef-guarded. A fixture that fails to
+      # generate therefore removes tests from the suite without failing
+      # anything -- the same shape of silent gap as #55, where CI ran zero
+      # tests and stayed green. All dependencies are installed above, so on CI
+      # a disabled fixture is a real problem, not a graceful degradation.
+      - name: Require all fixtures
+        run: |
+          if grep -q "fixture: DISABLED" configure.log; then
+            grep "fixture: DISABLED" configure.log
+            echo "::error::a test fixture failed to generate; the suite would silently shrink"
+            exit 1
+          fi
+          grep "fixture: enabled" configure.log
 
       - name: Build
         run: cmake --build build -j$(nproc 2>/dev/null || sysctl -n hw.ncpu)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7ddf0dd..5269253 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -204,9 +204,10 @@ if(FRAMEWRIGHT_BUILD_TESTS)
         )
         if(HDR_FIXTURE_RESULT EQUAL 0)
             set(HAVE_HDR_FIXTURE TRUE)
+            message(STATUS "HDR fixture: enabled")
         else()
             set(HAVE_HDR_FIXTURE FALSE)
-            message(STATUS "libx265 not available, HDR reader test fixture skipped")
+            message(STATUS "HDR fixture: DISABLED, libx265 not available")
         endif()
     else()
         message(WARNING "ffmpeg not found, test fixtures will not be generated")