diff --git a/code/nel/tools/nel_unit_test/ut_misc_string_common.h b/code/nel/tools/nel_unit_test/ut_misc_string_common.h
index 623d2d39e..b7c133e17 100644
--- a/code/nel/tools/nel_unit_test/ut_misc_string_common.h
+++ b/code/nel/tools/nel_unit_test/ut_misc_string_common.h
@@ -707,6 +707,12 @@ struct CUTMiscStringCommon : public Test::Suite
 		ret = NLMISC::fromString("yes", val);
 		TEST_ASSERT(ret && val);
 
+		ret = NLMISC::fromString("YES", val);
+		TEST_ASSERT(ret && val);
+
+		ret = NLMISC::fromString("True", val);
+		TEST_ASSERT(ret && val);
+
 		// false values
 		ret = NLMISC::fromString("0", val);
 		TEST_ASSERT(ret && !val);
@@ -730,14 +736,17 @@ struct CUTMiscStringCommon : public Test::Suite
 		TEST_ASSERT(ret && !val);
 
 		// wrong values
-		ret = NLMISC::fromString("YES", val);
-		TEST_ASSERT(!ret && !val);
-
 		ret = NLMISC::fromString("foo", val);
 		TEST_ASSERT(!ret && !val);
 
 		ret = NLMISC::fromString("a", val);
 		TEST_ASSERT(!ret && !val);
+
+		ret = NLMISC::fromString("Yesss", val);
+		TEST_ASSERT(!ret && !val);
+
+		ret = NLMISC::fromString("nope", val);
+		TEST_ASSERT(!ret && !val);
 	}
 };