diff --git a/.gitmodules b/.gitmodules
index 28bd7b3f..949580c7 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,3 @@
 [submodule "Source/Vendors/json"]
 	path = Source/Vendors/json
 	url = git@github.com:nlohmann/json.git
-[submodule "Source/Vendors/yaml-cpp"]
-	path = Source/Vendors/yaml-cpp
-	url = git@github.com:jbeder/yaml-cpp.git
diff --git a/Tests/Reference/Projects/DefaultHelp/Output.txt b/Tests/Reference/Projects/DefaultHelp/Output.txt
new file mode 100644
index 00000000..9cf0cf7d
--- /dev/null
+++ b/Tests/Reference/Projects/DefaultHelp/Output.txt
@@ -0,0 +1,2 @@
+Unknown command '/Users/tinganho/Development/l10ns/Tests/Current/Projects/DefaultHelp'.
+You are not inside a L10ns project.
diff --git a/Tests/Reference/Projects/DefaultHelp/stdout.out b/Tests/Reference/Projects/DefaultHelp/stdout.out
deleted file mode 100644
index 49c0bc6e..00000000
--- a/Tests/Reference/Projects/DefaultHelp/stdout.out
+++ /dev/null
@@ -1,15 +0,0 @@
-Usage: l10ns [<options>] <command>
-
-Commands:
-
-  init    Initialize project.
-  sync    Synchronize localization keys.
-  log     Show latest added localizations.
-  set     Set localization.
-
-For more details: 'l10ns <command> --help'.
-
-Options:
-
-  --help, -h     Print help description.
-  --version      Print current version.
diff --git a/Tests/Reference/Projects/UnknownCommandFlag/Output.txt b/Tests/Reference/Projects/UnknownCommandFlag/Output.txt
new file mode 100644
index 00000000..db4c9720
--- /dev/null
+++ b/Tests/Reference/Projects/UnknownCommandFlag/Output.txt
@@ -0,0 +1,2 @@
+Unknown command '/Users/tinganho/Development/l10ns/Tests/Current/Projects/UnknownCommandFlag'.
+You are not inside a L10ns project.
diff --git a/Tests/Reference/Projects/UnknownCommandFlag/stdout.out b/Tests/Reference/Projects/UnknownCommandFlag/stdout.out
deleted file mode 100644
index 3233903f..00000000
--- a/Tests/Reference/Projects/UnknownCommandFlag/stdout.out
+++ /dev/null
@@ -1 +0,0 @@
-Unknown command flag '--unknown'.