diff --git a/crates/typos-cli/tests/cmd/false-positives.toml b/crates/typos-cli/tests/cmd/false-positives.toml
index 276faf9a..324f41d7 100644
--- a/crates/typos-cli/tests/cmd/false-positives.toml
+++ b/crates/typos-cli/tests/cmd/false-positives.toml
@@ -1,11 +1,4 @@
 bin.name = "typos"
 stdin = ""
-stdout = """
-error: `afe` should be `safe`
-  ╭▸ ./sample.cpp:2:18
-  │
-2 │     uint8 i = 0x1afe23456UL;
-  ╰╴                 ━━━
-"""
+stdout = ""
 stderr = ""
-status.code = 2
diff --git a/crates/typos/src/tokens.rs b/crates/typos/src/tokens.rs
index a87a4834..19f5326a 100644
--- a/crates/typos/src/tokens.rs
+++ b/crates/typos/src/tokens.rs
@@ -281,7 +281,13 @@ mod parser {
         <T as Stream>::Slice: AsBStr + SliceLen + Default,
         <T as Stream>::Token: AsChar + Copy,
     {
-        ('0', alt(('x', 'X')), take_while(1.., is_hex_digit_with_sep))
+        (
+            '0',
+            alt(('x', 'X')),
+            take_while(1.., is_hex_digit_with_sep),
+            take_while(0.., is_xid_continue)
+                .verify(|s: &<T as Stream>::Slice| std::str::from_utf8(s.as_bstr()).is_ok()),
+        )
             .take()
             .parse_next(input)
     }
@@ -1270,11 +1276,6 @@ mod test {
         case: None,
         offset: 0,
     },
-    Identifier {
-        token: "0x1afe23456UL",
-        case: None,
-        offset: 17,
-    },
     Identifier {
         token: "World",
         case: None,
@@ -1294,11 +1295,6 @@ mod test {
         case: None,
         offset: 0,
     },
-    Identifier {
-        token: "0x1afe23456UL",
-        case: None,
-        offset: 17,
-    },
     Identifier {
         token: "World",
         case: None,