diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index 77bc3a9..146e6d9 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -550,8 +550,8 @@ jobs:
 
   build-macos-aarch64:
 
-    timeout-minutes: 60
-    runs-on: macos-11
+    timeout-minutes: 30
+    runs-on: macos-14
 
     steps:
     - name: Checkout repository
@@ -589,6 +589,27 @@ jobs:
         cmake .. -DCMAKE_C_COMPILER="$(brew --prefix llvm@15)/bin/clang" -DCMAKE_CXX_COMPILER="$(brew --prefix llvm@15)/bin/clang++" -DCMAKE_AR="$(brew --prefix llvm@15)/bin/llvm-ar" -DCMAKE_RANLIB="$(brew --prefix llvm@15)/bin/llvm-ranlib" -DCMAKE_C_FLAGS="-target arm64-apple-macos-11" -DCMAKE_CXX_FLAGS="-target arm64-apple-macos-11" -DSTATIC_LIBS=ON -DWITH_LTO=OFF -DARCH_ID=aarch64
         make -j3 p2pool
 
+    - name: Run RandomX tests
+      run: |
+        cd build
+        ./p2pool --test
+        make -j3 randomx-tests
+        external/src/RandomX/randomx-tests
+
+    - name: Build tests
+      run: |
+        cd tests
+        mkdir build
+        cd build
+        cmake .. -DCMAKE_C_COMPILER="$(brew --prefix llvm@15)/bin/clang" -DCMAKE_CXX_COMPILER="$(brew --prefix llvm@15)/bin/clang++" -DCMAKE_AR="$(brew --prefix llvm@15)/bin/llvm-ar" -DCMAKE_RANLIB="$(brew --prefix llvm@15)/bin/llvm-ranlib" -DCMAKE_C_FLAGS="-target arm64-apple-macos-11" -DCMAKE_CXX_FLAGS="-target arm64-apple-macos-11" -DSTATIC_LIBS=ON -DWITH_LTO=OFF -DARCH_ID=aarch64
+        make -j3
+
+    - name: Run tests
+      run: |
+        cd tests/build
+        gunzip *.gz
+        ./p2pool_tests
+
     - name: Archive binary
       uses: actions/upload-artifact@v4
       with:
diff --git a/.github/workflows/test-sync.yml b/.github/workflows/test-sync.yml
index 93ba777..c66c28f 100644
--- a/.github/workflows/test-sync.yml
+++ b/.github/workflows/test-sync.yml
@@ -271,7 +271,13 @@ jobs:
   sync-test-macos:
 
     timeout-minutes: 60
-    runs-on: macos-11
+    runs-on: ${{ matrix.config.os }}
+
+    strategy:
+      matrix:
+        config:
+          - {os: macos-11, flags: "-Og"}
+          - {os: macos-14, flags: "-Og -target arm64-apple-macos-11"}
 
     steps:
     - name: Checkout repository
@@ -287,7 +293,7 @@ jobs:
     - name: Build libcurl
       run: |
         cd external/src/curl
-        cmake . -DCMAKE_C_COMPILER="$(brew --prefix llvm@15)/bin/clang" -DCMAKE_AR="$(brew --prefix llvm@15)/bin/llvm-ar" -DCMAKE_RANLIB="$(brew --prefix llvm@15)/bin/llvm-ranlib" -DCMAKE_C_FLAGS="-Og" -DBUILD_CURL_EXE=OFF -DBUILD_SHARED_LIBS=OFF -DCURL_DISABLE_INSTALL=ON -DCURL_ENABLE_EXPORT_TARGET=OFF -DCURL_DISABLE_HEADERS_API=ON -DCURL_DISABLE_BINDLOCAL=ON -DBUILD_LIBCURL_DOCS=OFF -DCURL_ZLIB=OFF -DCURL_DISABLE_ALTSVC=ON -DCURL_DISABLE_COOKIES=ON -DCURL_DISABLE_DOH=ON -DCURL_DISABLE_GETOPTIONS=ON -DCURL_DISABLE_HSTS=ON -DCURL_DISABLE_LIBCURL_OPTION=ON -DCURL_DISABLE_MIME=ON -DCURL_DISABLE_NETRC=ON -DCURL_DISABLE_NTLM=ON -DCURL_DISABLE_PARSEDATE=ON -DCURL_DISABLE_PROGRESS_METER=ON -DCURL_DISABLE_SHUFFLE_DNS=ON -DCURL_DISABLE_SOCKETPAIR=ON -DCURL_DISABLE_VERBOSE_STRINGS=ON -DHTTP_ONLY=ON -DCURL_ENABLE_SSL=OFF -DUSE_LIBIDN2=OFF -DCURL_USE_LIBPSL=OFF -DCURL_USE_LIBSSH2=OFF -DENABLE_UNIX_SOCKETS=OFF
+        cmake . -DCMAKE_C_COMPILER="$(brew --prefix llvm@15)/bin/clang" -DCMAKE_AR="$(brew --prefix llvm@15)/bin/llvm-ar" -DCMAKE_RANLIB="$(brew --prefix llvm@15)/bin/llvm-ranlib" -DCMAKE_C_FLAGS="${{ matrix.config.flags }}" -DBUILD_CURL_EXE=OFF -DBUILD_SHARED_LIBS=OFF -DCURL_DISABLE_INSTALL=ON -DCURL_ENABLE_EXPORT_TARGET=OFF -DCURL_DISABLE_HEADERS_API=ON -DCURL_DISABLE_BINDLOCAL=ON -DBUILD_LIBCURL_DOCS=OFF -DCURL_ZLIB=OFF -DCURL_DISABLE_ALTSVC=ON -DCURL_DISABLE_COOKIES=ON -DCURL_DISABLE_DOH=ON -DCURL_DISABLE_GETOPTIONS=ON -DCURL_DISABLE_HSTS=ON -DCURL_DISABLE_LIBCURL_OPTION=ON -DCURL_DISABLE_MIME=ON -DCURL_DISABLE_NETRC=ON -DCURL_DISABLE_NTLM=ON -DCURL_DISABLE_PARSEDATE=ON -DCURL_DISABLE_PROGRESS_METER=ON -DCURL_DISABLE_SHUFFLE_DNS=ON -DCURL_DISABLE_SOCKETPAIR=ON -DCURL_DISABLE_VERBOSE_STRINGS=ON -DHTTP_ONLY=ON -DCURL_ENABLE_SSL=OFF -DUSE_LIBIDN2=OFF -DCURL_USE_LIBPSL=OFF -DCURL_USE_LIBSSH2=OFF -DENABLE_UNIX_SOCKETS=OFF
         make -j3
         cd lib && mkdir .libs && cp libcurl.a .libs
 
@@ -296,7 +302,7 @@ jobs:
         cd external/src/libuv
         mkdir build
         cd build
-        cmake .. -DCMAKE_C_COMPILER="$(brew --prefix llvm@15)/bin/clang" -DCMAKE_AR="$(brew --prefix llvm@15)/bin/llvm-ar" -DCMAKE_RANLIB="$(brew --prefix llvm@15)/bin/llvm-ranlib" -DCMAKE_C_FLAGS='-Og' -DBUILD_TESTING=OFF -DLIBUV_BUILD_SHARED=OFF
+        cmake .. -DCMAKE_C_COMPILER="$(brew --prefix llvm@15)/bin/clang" -DCMAKE_AR="$(brew --prefix llvm@15)/bin/llvm-ar" -DCMAKE_RANLIB="$(brew --prefix llvm@15)/bin/llvm-ranlib" -DCMAKE_C_FLAGS='${{ matrix.config.flags }}' -DBUILD_TESTING=OFF -DLIBUV_BUILD_SHARED=OFF
         make -j3
 
     - name: Build libzmq
@@ -304,14 +310,14 @@ jobs:
         cd external/src/libzmq
         mkdir build
         cd build
-        cmake .. -DCMAKE_C_COMPILER="$(brew --prefix llvm@15)/bin/clang" -DCMAKE_CXX_COMPILER="$(brew --prefix llvm@15)/bin/clang++" -DCMAKE_AR="$(brew --prefix llvm@15)/bin/llvm-ar" -DCMAKE_RANLIB="$(brew --prefix llvm@15)/bin/llvm-ranlib" -DCMAKE_C_FLAGS='-Og' -DCMAKE_CXX_FLAGS='-Og' -DWITH_LIBSODIUM=OFF -DWITH_LIBBSD=OFF -DBUILD_TESTS=OFF -DWITH_DOCS=OFF -DENABLE_DRAFTS=OFF -DBUILD_SHARED=OFF
+        cmake .. -DCMAKE_C_COMPILER="$(brew --prefix llvm@15)/bin/clang" -DCMAKE_CXX_COMPILER="$(brew --prefix llvm@15)/bin/clang++" -DCMAKE_AR="$(brew --prefix llvm@15)/bin/llvm-ar" -DCMAKE_RANLIB="$(brew --prefix llvm@15)/bin/llvm-ranlib" -DCMAKE_C_FLAGS='${{ matrix.config.flags }}' -DCMAKE_CXX_FLAGS='${{ matrix.config.flags }}' -DWITH_LIBSODIUM=OFF -DWITH_LIBBSD=OFF -DBUILD_TESTS=OFF -DWITH_DOCS=OFF -DENABLE_DRAFTS=OFF -DBUILD_SHARED=OFF
         make -j3
 
     - name: Build p2pool
       run: |
         mkdir build
         cd build
-        cmake .. -DCMAKE_C_COMPILER="$(brew --prefix llvm@15)/bin/clang" -DCMAKE_CXX_COMPILER="$(brew --prefix llvm@15)/bin/clang++" -DCMAKE_AR="$(brew --prefix llvm@15)/bin/llvm-ar" -DCMAKE_RANLIB="$(brew --prefix llvm@15)/bin/llvm-ranlib" -DWITH_LTO=OFF -DSTATIC_LIBS=ON -DDEV_TEST_SYNC=ON
+        cmake .. -DCMAKE_C_COMPILER="$(brew --prefix llvm@15)/bin/clang" -DCMAKE_CXX_COMPILER="$(brew --prefix llvm@15)/bin/clang++" -DCMAKE_AR="$(brew --prefix llvm@15)/bin/llvm-ar" -DCMAKE_RANLIB="$(brew --prefix llvm@15)/bin/llvm-ranlib" -DCMAKE_C_FLAGS='${{ matrix.config.flags }}' -DCMAKE_CXX_FLAGS='${{ matrix.config.flags }}' -DWITH_LTO=OFF -DSTATIC_LIBS=ON -DDEV_TEST_SYNC=ON
         make -j3 p2pool
 
     - name: Run p2pool
@@ -334,7 +340,7 @@ jobs:
     - name: Archive p2pool.log
       uses: actions/upload-artifact@v4
       with:
-        name: p2pool_macos_data
+        name: p2pool_${{ matrix.config.os }}_data
         path: |
           build/*.log
           build/data/
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index dc863a2..b5e5d8b 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -4,6 +4,7 @@ project(p2pool_tests)
 include(cmake/standard.cmake)
 
 option(STATIC_LIBS "Use locally built libuv and libzmq static libs" OFF)
+option(WITH_LTO "Use link-time compiler optimization (if linking fails for you, run cmake with -DWITH_LTO=OFF)" ON)
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")
 
diff --git a/tests/cmake/flags.cmake b/tests/cmake/flags.cmake
index 47f201a..03faea6 100644
--- a/tests/cmake/flags.cmake
+++ b/tests/cmake/flags.cmake
@@ -1,14 +1,15 @@
-set(CMAKE_CXX_EXTENSIONS OFF)
-set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
-set(CMAKE_C_STANDARD 99)
-set(CMAKE_C_STANDARD_REQUIRED ON)
+if (ARCH_ID MATCHES "^(aarch64|arm64|armv8-a)$")
+	set(ARMv8 1)
+endif()
 
 if (CMAKE_CXX_COMPILER_ID MATCHES GNU)
 	set(GENERAL_FLAGS "-pthread")
 	set(WARNING_FLAGS "-Wall -Wextra")
-	set(OPTIMIZATION_FLAGS "-Ofast -s -flto -fuse-linker-plugin")
+	set(OPTIMIZATION_FLAGS "-Ofast -s")
+
+	if (WITH_LTO)
+		set(OPTIMIZATION_FLAGS "${OPTIMIZATION_FLAGS} -flto -fuse-linker-plugin")
+	endif()
 
 	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
 	set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
@@ -48,7 +49,11 @@ elseif (CMAKE_CXX_COMPILER_ID MATCHES Clang)
 	endif()
 
 	set(WARNING_FLAGS "-Wall -Wextra -Wno-undefined-internal")
-	set(OPTIMIZATION_FLAGS "-Ofast -funroll-loops -fmerge-all-constants -flto")
+	set(OPTIMIZATION_FLAGS "-Ofast -funroll-loops -fmerge-all-constants")
+
+	if (WITH_LTO)
+		set(OPTIMIZATION_FLAGS "${OPTIMIZATION_FLAGS} -flto")
+	endif()
 
 	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
 	set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")