diff --git a/src/headers/parser/fake_parser.hpp b/src/headers/parser/fake_parser.hpp
index cba9de2..e4cb306 100644
--- a/src/headers/parser/fake_parser.hpp
+++ b/src/headers/parser/fake_parser.hpp
@@ -8,31 +8,16 @@
 #include <string>
 
 namespace argument_parser {
-    class fake_parser : public base_parser {
-        public: 
-        fake_parser() = default; 
+	class fake_parser : public base_parser {
+	public:
+		fake_parser() = default;
+		fake_parser(std::string program_name, std::vector<std::string> const &arguments);
+		fake_parser(std::string const &program_name, std::vector<std::string> &&arguments);
+		fake_parser(std::string const &program_name, std::initializer_list<std::string> const &arguments);
 
-        fake_parser(std::string program_name, std::vector<std::string> const& arguments) {
-            this->program_name = std::move(program_name); 
-            parsed_arguments = arguments;
-        }
-
-        fake_parser(std::string const& program_name, std::vector<std::string>&& arguments) {
-            this->program_name = program_name;
-            parsed_arguments = std::move(arguments);
-        }
-
-        fake_parser(std::string const& program_name, std::initializer_list<std::string> const& arguments) : 
-            fake_parser(program_name, std::vector<std::string>(arguments)) {}
-
-        void set_program_name(std::string const& program_name) {
-            this->program_name = program_name; 
-        }
-
-        void set_parsed_arguments(std::vector<std::string> const& parsed_arguments) {
-            this->parsed_arguments = parsed_arguments; 
-        }
-    }; 
-}
+		void set_program_name(std::string const &program_name);
+		void set_parsed_arguments(std::vector<std::string> const &parsed_arguments);
+	};
+} // namespace argument_parser
 
 #endif
\ No newline at end of file
diff --git a/src/source/parser/fake_parser.cpp b/src/source/parser/fake_parser.cpp
new file mode 100644
index 0000000..3f7b287
--- /dev/null
+++ b/src/source/parser/fake_parser.cpp
@@ -0,0 +1,24 @@
+#include "fake_parser.hpp"
+
+namespace argument_parser {
+	fake_parser::fake_parser(std::string program_name, std::vector<std::string> const &arguments) {
+		this->program_name = std::move(program_name);
+		parsed_arguments = arguments;
+	}
+
+	fake_parser::fake_parser(std::string const &program_name, std::vector<std::string> &&arguments) {
+		this->program_name = program_name;
+		parsed_arguments = std::move(arguments);
+	}
+
+	fake_parser::fake_parser(std::string const &program_name, std::initializer_list<std::string> const &arguments)
+		: fake_parser(program_name, std::vector<std::string>(arguments)) {}
+
+	void fake_parser::set_program_name(std::string const &program_name) {
+		this->program_name = program_name;
+	}
+
+	void fake_parser::set_parsed_arguments(std::vector<std::string> const &parsed_arguments) {
+		this->parsed_arguments = parsed_arguments;
+	}
+} // namespace argument_parser
\ No newline at end of file