diff --git a/src/etc/test-float-parse/src/gen/exhaustive.rs b/src/etc/test-float-parse/src/gen/exhaustive.rs
index 01458fb0b6084..4b194f5febd3e 100644
--- a/src/etc/test-float-parse/src/gen/exhaustive.rs
+++ b/src/etc/test-float-parse/src/gen/exhaustive.rs
@@ -18,7 +18,7 @@ where
     type WriteCtx = F;
 
     fn total_tests() -> u64 {
-        1u64.checked_shl(F::Int::BITS).expect("More than u64::MAX tests")
+        2u64.saturating_pow(F::Int::BITS)
     }
 
     fn new() -> Self {