diff --git a/.github/workflows/Intel.yml b/.github/workflows/Intel.yml
index 78b962f3..7b8a5ed9 100644
--- a/.github/workflows/Intel.yml
+++ b/.github/workflows/Intel.yml
@@ -34,7 +34,7 @@ jobs:
 
     - name: build
       run: |
-        cmake -S ip -B ip/build -DOPENMP=${{ matrix.openmp }} -DBUILD_SHARED_LIBS=OFF -DBUILD_8=ON
+        cmake -S ip -B ip/build -DOPENMP=${{ matrix.openmp }} -DBUILD_SHARED_LIBS=OFF -DBUILD_8=ON -DFTP_TEST_FILES=ON
         cmake --build ip/build --parallel 2 --verbose
     
     - name: test
diff --git a/.github/workflows/Linux.yml b/.github/workflows/Linux.yml
index 32157027..6694b262 100644
--- a/.github/workflows/Linux.yml
+++ b/.github/workflows/Linux.yml
@@ -43,7 +43,7 @@ jobs:
       run: |
         sudo apt install libopenblas-serial-dev
         export CC=gcc-${{ matrix.gcc-version }} ; export FC=gfortran-${{ matrix.gcc-version }}
-        cmake -S ip -B ip/build -DCMAKE_PREFIX_PATH="~/" -DOPENMP=${{ matrix.openmp }} ${{ matrix.options }} -DCMAKE_INSTALL_PREFIX=~/install -DBLA_VENDOR=OpenBLAS
+        cmake -S ip -B ip/build -DCMAKE_PREFIX_PATH="~/" -DOPENMP=${{ matrix.openmp }} ${{ matrix.options }} -DCMAKE_INSTALL_PREFIX=~/install -DBLA_VENDOR=OpenBLAS -DFTP_TEST_FILES=ON
         cmake --build ip/build --parallel 2 --verbose
         cmake --install ip/build
         # Ensure that manual setting of '-DBLA_VENDOR=...' is reflected in output CMake config
diff --git a/.github/workflows/MacOS.yml b/.github/workflows/MacOS.yml
index 5960da91..9f17e938 100644
--- a/.github/workflows/MacOS.yml
+++ b/.github/workflows/MacOS.yml
@@ -32,7 +32,7 @@ jobs:
 
     - name: build
       run: |
-        cmake -S ip -B ip/build -DOPENMP=${{ matrix.openmp }} -DBUILD_SHARED_LIBS=${{ matrix.sharedlibs }} -DCMAKE_INSTALL_PREFIX=~/install -DBUILD_8=ON -DCMAKE_BUILD_TYPE=Debug
+        cmake -S ip -B ip/build -DOPENMP=${{ matrix.openmp }} -DBUILD_SHARED_LIBS=${{ matrix.sharedlibs }} -DCMAKE_INSTALL_PREFIX=~/install -DBUILD_8=ON -DCMAKE_BUILD_TYPE=Debug -DFTP_TEST_FILES=ON
         cmake --build ip/build --parallel 2 --verbose
         cmake --install ip/build
         ls -l ~/install
diff --git a/.github/workflows/developer.yml b/.github/workflows/developer.yml
index ecdd1bce..4db558d2 100644
--- a/.github/workflows/developer.yml
+++ b/.github/workflows/developer.yml
@@ -17,8 +17,8 @@ jobs:
   developer:
     runs-on: ubuntu-latest
     env:
-      FC: gfortran-11
-      CC: gcc-11
+      FC: gfortran-13
+      CC: gcc-13
 
     steps:
 
@@ -35,7 +35,7 @@ jobs:
 
     - name: build
       run: |
-        cmake -S ip -B ip/build -DENABLE_DOCS=YES -DOPENMP=ON -DCMAKE_Fortran_FLAGS="-g -fprofile-abs-path -fprofile-arcs -ftest-coverage -O0 -fsanitize=address" -DCMAKE_C_FLAGS="-g -fprofile-abs-path -fprofile-arcs -ftest-coverage -O0 -fsanitize=address" -DCMAKE_BUILD_TYPE=Debug -DBUILD_SHARED_LIBS=ON -DBUILD_8=ON
+        cmake -S ip -B ip/build -DENABLE_DOCS=YES -DOPENMP=ON -DCMAKE_Fortran_FLAGS="-g -fprofile-abs-path -fprofile-arcs -ftest-coverage -O0 -fsanitize=address" -DCMAKE_C_FLAGS="-g -fprofile-abs-path -fprofile-arcs -ftest-coverage -O0 -fsanitize=address" -DCMAKE_BUILD_TYPE=Debug -DBUILD_SHARED_LIBS=ON -DBUILD_8=ON -DFTP_TEST_FILES=ON
         cmake --build ip/build --parallel 2 --verbose
     
     - name: test
@@ -57,4 +57,3 @@ jobs:
         name: docs
         path: |
           ip/build/docs/html
-