diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 9040d8372..35fb9573c 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -25,7 +25,7 @@ jobs:
         run: apt-get update ; apt-get install -y git unzip
       - uses: actions/checkout@v3
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@latest
+        uses: lukka/get-cmake@v3.27.7
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -62,7 +62,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@latest
+        uses: lukka/get-cmake@v3.27.7
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -79,7 +79,7 @@ jobs:
         run: apt-get update ; apt-get install -y git clang-tools unzip
       - uses: actions/checkout@v3
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@latest
+        uses: lukka/get-cmake@v3.27.7
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -96,7 +96,7 @@ jobs:
         run: apt-get update ; apt-get install -y build-essential unzip wget git
       - uses: actions/checkout@v3
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@latest
+        uses: lukka/get-cmake@v3.27.7
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -134,7 +134,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@latest
+        uses: lukka/get-cmake@v3.27.7
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
@@ -151,7 +151,7 @@ jobs:
         run: apt-get update ; apt-get install -y unzip git
       - uses: actions/checkout@v3
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@latest
+        uses: lukka/get-cmake@v3.27.7
       - name: Set env FORCE_STDCPPFS_FLAG for clang 7 / 8 / 9 / 10
         run: echo "JSON_FORCED_GLOBAL_COMPILE_OPTIONS=-DJSON_HAS_FILESYSTEM=0;-DJSON_HAS_EXPERIMENTAL_FILESYSTEM=0" >> "$GITHUB_ENV"
         if: ${{ matrix.compiler == '7' || matrix.compiler == '8' || matrix.compiler == '9' || matrix.compiler == '10' }}
@@ -197,7 +197,7 @@ jobs:
         run: apt-get update ; apt-get install -y git unzip
       - uses: actions/checkout@v3
       - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@latest
+        uses: lukka/get-cmake@v3.27.7
       - name: Run CMake
         run: cmake -S . -B build -DJSON_CI=On
       - name: Build
diff --git a/tests/src/unit-custom-base-class.cpp b/tests/src/unit-custom-base-class.cpp
index ca916a9b9..2526453bf 100644
--- a/tests/src/unit-custom-base-class.cpp
+++ b/tests/src/unit-custom-base-class.cpp
@@ -239,7 +239,7 @@ template <class Ptr, class Fnc>
 void visitor_adaptor::do_visit(const Ptr& ptr, const Fnc& fnc) const
 {
     using value_t = nlohmann::detail::value_t;
-    const json_with_visitor_t& json = *static_cast<const json_with_visitor_t*>(this);
+    const json_with_visitor_t& json = *static_cast<const json_with_visitor_t*>(this); // NOLINT(cppcoreguidelines-pro-type-static-cast-downcast)
     switch (json.type())
     {
         case value_t::object: