diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e353df2..1dc7b92 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        config: 
+        config:
         - {
             name: "ubuntu_latest_gcc_cxx11",
             os: ubuntu-latest,
@@ -63,30 +63,6 @@ jobs:
             cxx: "g++-11",
             cxxstd: "20"
           }
-        - {
-            name: "ubuntu_latest_clang11_cxx11",
-            os: ubuntu-latest,
-            build_type: "Release",
-            cc: "clang-11",
-            cxx: "clang++-11",
-            cxxstd: "11"
-          }
-        - {
-            name: "ubuntu_latest_clang11_cxx14",
-            os: ubuntu-latest,
-            build_type: "Release",
-            cc: "clang-11",
-            cxx: "clang++-11",
-            cxxstd: "14"
-          }
-        - {
-            name: "ubuntu_latest_clang12_cxx14",
-            os: ubuntu-latest,
-            build_type: "Release",
-            cc: "clang-12",
-            cxx: "clang++-12",
-            cxxstd: "14"
-          }
         - {
             name: "ubuntu22_clang13_cxx17",
             os: ubuntu-22.04,
@@ -145,14 +121,14 @@ jobs:
         shell: bash
         working-directory: tests
         run: |
-          export SHOULD_RUN_COVERAGE="y"
-          ./cov_check
-          cd ..
-          curl https://keybase.io/codecovsecurity/pgp_keys.asc | gpg --no-default-keyring --keyring trustedkeys.gpg --import
-          curl -Os https://uploader.codecov.io/latest/linux/codecov
-          curl -Os https://uploader.codecov.io/latest/linux/codecov.SHA256SUM
-          curl -Os https://uploader.codecov.io/latest/linux/codecov.SHA256SUM.sig
-          gpgv codecov.SHA256SUM.sig codecov.SHA256SUM
-          shasum -a 256 -c codecov.SHA256SUM
-          chmod +x codecov
-          ./codecov
+          sudo apt-get install lcov
+          lcov --directory . --capture --output-file coverage.info
+
+      - name: Upload to Codecov
+        if: startsWith(matrix.config.build_type, 'Coverage')
+        uses: codecov/codecov-action@v5
+        with:
+          fail_ci_if_error: true
+          name: gcem
+          files: ${{ runner.workspace }}/tests/coverage.info
+          verbose: true
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d71526c..79c419f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,7 +18,7 @@
 ##
 ################################################################################
 
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.31)
 project(gcem)
 
 set(GCEM_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/include)
@@ -43,7 +43,7 @@ message(STATUS "GCE-Math version ${${PROJECT_NAME}_VERSION}")
 if(NOT MSVC)
     include(CheckCXXCompilerFlag)
     CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
-    
+
     if(COMPILER_SUPPORTS_CXX11)
         message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has C++11 support.")
     else()
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 2378b57..beddf78 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -18,7 +18,7 @@
 ##
 ################################################################################
 
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.31)
 
 if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
     project(gcem-test)
@@ -35,7 +35,7 @@ set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
 if(NOT MSVC)
     include(CheckCXXCompilerFlag)
     CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
-    
+
     if(COMPILER_SUPPORTS_CXX11)
         if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
             set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -g -O0 -Wall -Wextra --coverage -fno-inline -fno-inline-small-functions -fno-default-inline")
@@ -66,7 +66,7 @@ foreach( file_ ${GCEM_TESTS} )
 
     add_executable( ${testname} EXCLUDE_FROM_ALL ${filename} )
     target_link_libraries( ${testname} gcem )
-    
+
     list(APPEND GCEM_TESTS_EX ${testname})
 endforeach()
 
diff --git a/tests/cov_check b/tests/cov_check
deleted file mode 100755
index d844fcb..0000000
--- a/tests/cov_check
+++ /dev/null
@@ -1,22 +0,0 @@
-
-echo "SHOULD_RUN_COVERAGE: ${SHOULD_RUN_COVERAGE}"
-
-if [[ "${SHOULD_RUN_COVERAGE}" == "y" ]]; then 
-
-    if [ -z ${CCOV+x} ]; then 
-        CCOV=gcov
-    fi
-
-    echo "CCOV set to ${CCOV}"
-
-    for t in ./*.cpp; do
-        $CCOV "$t" > /dev/null 2>&1
-    done
-
-    ./pow.test > /dev/null 2>&1
-    $CCOV pow.cpp > /dev/null 2>&1
-    ./exp.test > /dev/null 2>&1
-    $CCOV exp.cpp > /dev/null 2>&1
-    ./log.test > /dev/null 2>&1
-    $CCOV log.cpp > /dev/null 2>&1
-fi
diff --git a/tests/run_tests b/tests/run_tests
index 10f0e48..9d28fda 100755
--- a/tests/run_tests
+++ b/tests/run_tests
@@ -1,3 +1,4 @@
+#!/bin/bash
 
 for t in ./*.test; do
    "$t"