diff --git a/src/protocol/tests/parser_literals.rs b/src/protocol/tests/parser_literals.rs
index de343928abfb66f8f8b6cc0399badfa476c205b4..9560cbfe1a33d149a16f4d475688938e841f86ae 100644
--- a/src/protocol/tests/parser_literals.rs
+++ b/src/protocol/tests/parser_literals.rs
@@ -69,6 +69,47 @@ fn test_string_literals() {
     ").error(|e| { e.assert_msg_has(0, "non-ASCII character in string literal"); });
 }
 
+#[test]
+fn test_bytestring_literals() {
+    Tester::new_single_source_expect_ok("valid", "
+        func test() -> u8[] {
+            auto v1 = b\"Hello, world!\";
+            auto v2 = b\"\\t\\r\\n\\\\\"; // why hello there, confusing thing
+            auto v3 = b\"\";
+            return b\"No way, dude!\";
+        }
+    ").for_function("test", |f| { f
+        .for_variable("v1", |v| { v.assert_concrete_type("u8[]"); })
+        .for_variable("v2", |v| { v.assert_concrete_type("u8[]"); })
+        .for_variable("v3", |v| { v.assert_concrete_type("u8[]"); });
+    });
+
+    Tester::new_single_source_expect_err("unterminated simple", "
+        func test() -> u8[] { return b\"'; }
+    ").error(|e| { e
+        .assert_num(1)
+        .assert_occurs_at(0, "b\"")
+        .assert_msg_has(0, "unterminated");
+    });
+
+    Tester::new_single_source_expect_err("unterminated with preceding escaped", "
+        func test() -> u8[] { return b\"\\\"; }
+    ").error(|e| { e
+        .assert_num(1)
+        .assert_occurs_at(0, "b\"\\")
+        .assert_msg_has(0, "unterminated");
+    });
+
+    Tester::new_single_source_expect_err("invalid escaped character", "
+        func test() -> u8[] { return b\"\\y\"; }
+    ").error(|e| { e.assert_msg_has(0, "unsupported escape character 'y'"); });
+
+    // Note sure if this should always be in here...
+    Tester::new_single_source_expect_err("non-ASCII string", "
+        func test() -> u8[] { return b\"💧\"; }
+    ").error(|e| { e.assert_msg_has(0, "non-ASCII character in string literal"); });
+}
+
 #[test]
 fn test_tuple_literals() {
     Tester::new_single_source_expect_ok("zero tuples", "