diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ea735ca..56d8b9f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,6 +24,7 @@ on:
 
 jobs:
   build:
+    timeout-minutes: 5
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
@@ -31,28 +32,12 @@ jobs:
 
     runs-on: ${{ matrix.os }}
 
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Configure CMake
-        run: cmake -B build -DCMAKE_BUILD_TYPE=Release
-
-      - name: Build
-        run: cmake --build build --config Release
-
-      - name: Run tests
-        working-directory: build
-        run: ctest -C Release --output-on-failure
-
-  lint:
-    runs-on: ubuntu-latest
-
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
 
       - name: Check file sizes
+        if: runner.os == 'Linux'
         run: |
           MAX_LINES=1500
           FAILED=0
@@ -70,8 +55,19 @@ jobs:
           echo "All source files are within the $MAX_LINES line limit."
 
       - name: Check formatting with clang-format
+        if: runner.os == 'Linux'
         continue-on-error: true
         run: |
           sudo apt-get install -y clang-format-17 > /dev/null 2>&1
           echo "Checking formatting of source files..."
           find src/ include/ -name "*.cpp" -o -name "*.h" | xargs clang-format-17 --dry-run --Werror 2>&1 || echo "::warning::Code formatting issues found. Run clang-format to fix."
+
+      - name: Configure CMake
+        run: cmake -B build -DCMAKE_BUILD_TYPE=Release
+
+      - name: Build
+        run: cmake --build build --config Release
+
+      - name: Run tests
+        working-directory: build
+        run: ctest -C Release --output-on-failure
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d9e244e..f395fa6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,6 +39,13 @@ if( WIN32 )
         "${CMAKE_CURRENT_SOURCE_DIR}/3p" )
     target_link_libraries(${PROJECT_NAME} PRIVATE
         "${CMAKE_CURRENT_SOURCE_DIR}/3p/doublets_ffi.dll.lib" )
+    # Increase stack size to 8MB on Windows (default 1MB causes stack overflow
+    # with deeply recursive export_json on large inputs like text2.json)
+    if( MSVC )
+        target_link_options(${TARGET_NAME} PRIVATE /STACK:8388608)
+    else()
+        target_link_options(${TARGET_NAME} PRIVATE -Wl,--stack,8388608)
+    endif()
 endif()
 
 # Add tests: for each test JSON file, run avm and compare output with expected
@@ -78,6 +85,11 @@ target_compile_definitions( avm_unit_test PRIVATE AVM_NO_MAIN )
 if( WIN32 )
     target_link_libraries( avm_unit_test PRIVATE
         "${CMAKE_CURRENT_SOURCE_DIR}/3p/doublets_ffi.dll.lib" )
+    if( MSVC )
+        target_link_options(avm_unit_test PRIVATE /STACK:8388608)
+    else()
+        target_link_options(avm_unit_test PRIVATE -Wl,--stack,8388608)
+    endif()
 endif()
 
 add_test( NAME unit_tests COMMAND avm_unit_test )
diff --git a/cmake/run_test.cmake b/cmake/run_test.cmake
index 92a9c3b..2ba5a42 100644
--- a/cmake/run_test.cmake
+++ b/cmake/run_test.cmake
@@ -6,6 +6,12 @@
 
 get_filename_component(TEST_NAME "${TEST_FILE}" NAME)
 
+# Remove stale output from previous tests to avoid false positives
+set(RES_FILE "${TEST_DIR}/res.json")
+if(EXISTS "${RES_FILE}")
+    file(REMOVE "${RES_FILE}")
+endif()
+
 # Run avm on the test file from the test directory
 # Note: avm may return non-zero due to static destructor cleanup issues,
 # so we check the output file content instead of relying on exit code
@@ -31,6 +37,10 @@ file(READ "${TEST_FILE}" EXPECTED_CONTENT)
 string(STRIP "${ACTUAL_CONTENT}" ACTUAL_CONTENT)
 string(STRIP "${EXPECTED_CONTENT}" EXPECTED_CONTENT)
 
+# Normalize line endings (CRLF -> LF) for cross-platform compatibility
+string(REPLACE "\r\n" "\n" ACTUAL_CONTENT "${ACTUAL_CONTENT}")
+string(REPLACE "\r\n" "\n" EXPECTED_CONTENT "${EXPECTED_CONTENT}")
+
 if(NOT "${ACTUAL_CONTENT}" STREQUAL "${EXPECTED_CONTENT}")
     message(FATAL_ERROR "Test ${TEST_NAME} FAILED:\nExpected: ${EXPECTED_CONTENT}\nActual:   ${ACTUAL_CONTENT}")
 endif()