diff --git a/tests/test_parse.cpp b/tests/test_parse.cpp
index fb0dd23..400942f 100644
--- a/tests/test_parse.cpp
+++ b/tests/test_parse.cpp
@@ -50,6 +50,10 @@ TEST(parse_pi_error)
 		CHECK(doc.load(STR("<?name value"), flags).status == status_bad_pi);
 		CHECK(doc.load(STR("<?name value "), flags).status == status_bad_pi);
 		CHECK(doc.load(STR("<?name value  "), flags).status == status_bad_pi);
+		CHECK(doc.load(STR("<?name value  ?"), flags).status == status_bad_pi);
+		CHECK(doc.load(STR("<?name value  ? "), flags).status == status_bad_pi);
+		CHECK(doc.load(STR("<?name value  ? >"), flags).status == status_bad_pi);
+		CHECK(doc.load(STR("<?name value  ? > "), flags).status == status_bad_pi);
 	}
 	
 	CHECK(doc.load(STR("<?xx#?>"), parse_minimal | parse_pi).status == status_bad_pi);