diff --git a/CMakeLists.txt b/CMakeLists.txt
index 194c00f..727e71c 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,11 +2,11 @@ cmake_minimum_required(VERSION 3.13)
 project(PorygonLang)
 
 set(CMAKE_CXX_STANDARD 17)
+add_subdirectory(extern/Catch2)
 
 add_library(PorygonLang src/main.cpp src/main.h++ src/Parser/Lexer.cpp src/Parser/Lexer.hpp src/Parser/TokenKind.hpp src/Parser/Token.hpp)
 add_executable(PorygonLangTests src/main.cpp src/main.h++ src/Parser/Lexer.cpp src/Parser/Lexer.hpp src/Parser/TokenKind.hpp src/Parser/Token.hpp src/Parser/LexerTests.cpp)
 
-add_subdirectory(extern/Catch2)
 target_link_libraries(PorygonLangTests Catch2::Catch2)
 target_compile_definitions(PorygonLangTests PRIVATE TESTS_BUILD)
 
diff --git a/src/Parser/LexerTests.cpp b/src/Parser/LexerTests.cpp
index 3c8a505..53191ed 100644
--- a/src/Parser/LexerTests.cpp
+++ b/src/Parser/LexerTests.cpp
@@ -1,5 +1,6 @@
 
 #ifdef TESTS_BUILD
+#define CATCH_CONFIG_MAIN
 #include <catch2/catch.hpp>
 #include "Lexer.hpp"