diff --git a/scanner.h b/scanner.h
index 48ba219..63a911b 100644
--- a/scanner.h
+++ b/scanner.h
@@ -45,7 +45,6 @@ namespace YAML
 			void Invalidate();
 
 			int pos, line, column, flowLevel;
-			bool required;
 			Token *pMapStart, *pKey;
 		};
 
diff --git a/simplekey.cpp b/simplekey.cpp
index 040c398..a5e6bc3 100644
--- a/simplekey.cpp
+++ b/simplekey.cpp
@@ -6,7 +6,7 @@
 namespace YAML
 {
 	Scanner::SimpleKey::SimpleKey(int pos_, int line_, int column_, int flowLevel_)
-		: pos(pos_), line(line_), column(column_), flowLevel(flowLevel_), required(false), pMapStart(0), pKey(0)
+		: pos(pos_), line(line_), column(column_), flowLevel(flowLevel_), pMapStart(0), pKey(0)
 	{
 	}
 
@@ -20,9 +20,6 @@ namespace YAML
 
 	void Scanner::SimpleKey::Invalidate()
 	{
-		if(required)
-			throw ParserException(line, column, "required simple key not found");
-
 		if(pMapStart)
 			pMapStart->status = TS_INVALID;
 		if(pKey)
@@ -40,8 +37,6 @@ namespace YAML
 		key.pMapStart = PushIndentTo(INPUT.column, false);
 		if(key.pMapStart)
 			key.pMapStart->status = TS_UNVERIFIED;
-//		else
-//			key.required = true;	// TODO: is this correct?
 
 		// then add the (now unverified) key
 		key.pKey = new Token(TT_KEY, INPUT.line, INPUT.column);
diff --git a/yaml-reader.vcproj b/yaml-reader.vcproj
index 5239b09..b708279 100644
--- a/yaml-reader.vcproj
+++ b/yaml-reader.vcproj
@@ -329,6 +329,22 @@
 			Filter="rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav"
 			UniqueIdentifier="{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}"
 			>
+			<File
+				RelativePath=".\tests\directives.yaml"
+				>
+			</File>
+			<File
+				RelativePath=".\tests\mixed.yaml"
+				>
+			</File>
+			<File
+				RelativePath=".\tests\scalars.yaml"
+				>
+			</File>
+			<File
+				RelativePath=".\tests\simple.yaml"
+				>
+			</File>
 			<File
 				RelativePath=".\test.yaml"
 				>