When writing tests for configuration-dependent functionality, implement environment detection and conditional logic to handle platform-specific differences. Tests should detect system capabilities and adjust expectations accordingly rather than assuming uniform behavior across all environments. Key practices: - Use capability detection before testing features that may not be universally supported - Implement platform-specific path handling and formatting - Adjust test expectations based on detected environment characteristics Example from cross-platform path handling: ```bash if is_windows; then expected_path=$(echo "$bazelrc" | sed 's/^C:/c:/; s/\//\\\\/g') else expected_path="$bazelrc" fi expect_log "source: \"$expected_path\"" ``` Example from compiler feature detection: ```bash # Check if __builtin_FILE is supported and skip test if not supported if ! compiler_supports_builtin_file; then echo "Skipping test: __builtin_FILE not supported" return fi ``` This approach ensures tests are robust across different execution environments while maintaining meaningful validation of configuration behavior.