diff --git a/rwgame/GameConfig.cpp b/rwgame/GameConfig.cpp
index 8b483eaf..713a9ee6 100644
--- a/rwgame/GameConfig.cpp
+++ b/rwgame/GameConfig.cpp
@@ -99,6 +99,12 @@ struct IntTranslator {
     }
 };
 
+bool GameConfig::saveConfig() {
+    auto filename = getConfigFile();
+    return parseConfig(ParseType::CONFIG, "",
+        ParseType::FILE, filename);
+}
+
 std::string GameConfig::getDefaultINIString() {
     std::string result;
     parseConfig(ParseType::DEFAULT, "", ParseType::STRING, result);
diff --git a/rwgame/GameConfig.hpp b/rwgame/GameConfig.hpp
index f9a3569b..91199228 100644
--- a/rwgame/GameConfig.hpp
+++ b/rwgame/GameConfig.hpp
@@ -17,6 +17,11 @@ public:
      */
     std::string getConfigFile() const;
 
+    /**
+     * @brief writeConfig Save the game configuration
+     */
+    bool saveConfig();
+
     /**
      * @brief isValid
      * @return True if the loaded configuration is valid
diff --git a/tests/test_config.cpp b/tests/test_config.cpp
index 3ec87ebc..2bbfd7c8 100644
--- a/tests/test_config.cpp
+++ b/tests/test_config.cpp
@@ -8,21 +8,22 @@
 
 namespace fs = boost::filesystem;
 
-typedef std::map<std::string, std::map<std::string, std::string>> config_t;
+typedef std::map<std::string, std::map<std::string, std::string>> simpleConfig_t;
      
 fs::path getRandomFilePath() {
     return fs::unique_path(fs::temp_directory_path() /= "openrw_test_%%%%%%%%%%%%%%%%");
 }
 
-config_t getValidConfig() {
-    config_t result;
-    result["game"]["\tpath    "] = "\t/dev/test  \t \r\n";
-    result["game"]["language\t "] = "      american ;american english french german italian spanish.";
+simpleConfig_t getValidConfig() {
+    simpleConfig_t result;
+    // Don't change game.path and input.invert_y keys. Tests depend on them.
+    result["game"]["path"] = "\t/dev/test  \t \r\n";
+    result["game"]["\tlanguage\t "] = "      american ;american english french german italian spanish.";
     result["input"]["invert_y"] = "1 #values != 0 enable input inversion. Optional.";
     return result;
 }
 
-std::ostream &writeConfig(std::ostream &os, const config_t &config) {
+std::ostream &writeConfig(std::ostream &os, const simpleConfig_t &config) {
     for (auto &section : config) {
         os << "[" << section.first << "]" << "\n";
         for (auto &keyValue : section.second) {
@@ -32,11 +33,10 @@ std::ostream &writeConfig(std::ostream &os, const config_t &config) {
     return os;
 }
 
-#include <iostream>
-
 BOOST_AUTO_TEST_SUITE(ConfigTests)
 
 BOOST_AUTO_TEST_CASE(test_config_valid) {
+    // Test reading a valid configuration file
     auto cfg = getValidConfig();
     auto configPath = getRandomFilePath();
 
@@ -55,7 +55,9 @@ BOOST_AUTO_TEST_CASE(test_config_valid) {
 }
 
 BOOST_AUTO_TEST_CASE(test_config_valid_modified) {
+    // Test reading a valid modified configuration file
     auto cfg = getValidConfig();
+    cfg["game"]["path"] = "Liberty City";
     cfg["input"]["invert_y"] = "0";
     auto configPath = getRandomFilePath();
 
@@ -69,9 +71,38 @@ BOOST_AUTO_TEST_CASE(test_config_valid_modified) {
     BOOST_CHECK(config.isValid());
 
     BOOST_CHECK_EQUAL(config.getInputInvertY(), false);
+    BOOST_CHECK_EQUAL(config.getGameDataPath(), "Liberty City");
+}
+
+BOOST_AUTO_TEST_CASE(test_config_save) {
+    // Test saving a configuration file
+    auto cfg = getValidConfig();
+    cfg["game"]["path"] = "Liberty City";
+    auto configPath = getRandomFilePath();
+
+    std::ofstream ofs(configPath.string());
+    writeConfig(ofs, cfg);
+    ofs.close();
+
+    GameConfig config(configPath.filename().string(),
+            configPath.parent_path().string());
+
+    BOOST_CHECK(config.isValid());
+    
+    fs::remove(configPath);
+    
+    BOOST_CHECK(!fs::exists(configPath));
+    BOOST_CHECK(config.saveConfig());
+    BOOST_CHECK(fs::exists(configPath));
+    
+    GameConfig config2(configPath.filename().string(),
+            configPath.parent_path().string());
+    
+    BOOST_CHECK_EQUAL(config2.getGameDataPath(), "Liberty City");
 }
 
 BOOST_AUTO_TEST_CASE(test_config_invalid_duplicate) {
+    // Test duplicate keys in invalid configuration file
     auto cfg = getValidConfig();
     cfg["input"]["invert_y    "] = "0";
     auto configPath = getRandomFilePath();
@@ -86,10 +117,11 @@ BOOST_AUTO_TEST_CASE(test_config_invalid_duplicate) {
     BOOST_CHECK(!config.isValid());
 }
 
-BOOST_AUTO_TEST_CASE(test_config_invalid_empty) {
-    config_t cfg;
+BOOST_AUTO_TEST_CASE(test_config_invalid_required_missing) {
+    // Test missing required keys in invalid configuration file
+    auto cfg = getValidConfig();
+    cfg["game"].erase("path");
     auto configPath = getRandomFilePath();
-    std::cout << configPath.string() << "\n";
 
     std::ofstream ofs(configPath.string());
     writeConfig(ofs, cfg);
@@ -101,4 +133,29 @@ BOOST_AUTO_TEST_CASE(test_config_invalid_empty) {
     BOOST_CHECK(!config.isValid());
 }
 
+BOOST_AUTO_TEST_CASE(test_config_invalid_empty) {
+    // Test reading empty configuration file
+    simpleConfig_t cfg;
+    auto configPath = getRandomFilePath();
+
+    std::ofstream ofs(configPath.string());
+    writeConfig(ofs, cfg);
+    ofs.close();
+
+    GameConfig config(configPath.filename().string(),
+            configPath.parent_path().string());
+
+    BOOST_CHECK(!config.isValid());
+}
+
+BOOST_AUTO_TEST_CASE(test_config_invalid_nonexisting) {
+    // Test reading non-existing configuration file
+    auto configPath = getRandomFilePath();
+
+    GameConfig config(configPath.filename().string(),
+            configPath.parent_path().string());
+
+    BOOST_CHECK(!config.isValid());
+}
+
 BOOST_AUTO_TEST_SUITE_END()