diff --git a/tests/if.rs b/tests/if.rs
index cbb296f..6bd6cc7 100644
--- a/tests/if.rs
+++ b/tests/if.rs
@@ -93,8 +93,18 @@ test!(
     "@\\69 f true {\n  a {\n    color: red;\n  }\n}\n",
     "a {\n  color: red;\n}\n"
 );
+test!(
+    uppercase_escaped_if,
+    "@\\49 f true {\n  a {\n    color: red;\n  }\n}\n",
+    "a {\n  color: red;\n}\n"
+);
 test!(
     escaped_else,
     "@if false {}\n\n@\\65lse {\n  a {\n    color: red;\n  }\n}\n",
     "a {\n  color: red;\n}\n"
 );
+test!(
+    uppercase_escaped_else,
+    "@if false {}\n\n@\\45lse {\n  a {\n    color: red;\n  }\n}\n",
+    "a {\n  color: red;\n}\n"
+);