diff --git a/src/common.rs b/src/common.rs
index 1987356..ee94712 100644
--- a/src/common.rs
+++ b/src/common.rs
@@ -36,12 +36,7 @@ pub(crate) fn ceil_f64(v: f64) -> f64 {
 pub(crate) fn ceil_f64(v: f64) -> f64 {
     debug_assert!(v >= 0.0);
 
-    // `Decimal::from_f64` returns `None` for non-finite values, so fall back to
-    // the input and mirror `f64::ceil` instead of panicking.
-    match Decimal::from_f64(v) {
-        Some(d) => d.ceil().to_f64().unwrap_or(v),
-        None => v,
-    }
+    Decimal::from_f64(v).unwrap().ceil().to_f64().unwrap()
 }
 
 #[cfg(any(feature = "byte", feature = "bit"))]
@@ -59,12 +54,7 @@ pub(crate) fn ceil_f32(v: f32) -> f32 {
 pub(crate) fn ceil_f32(v: f32) -> f32 {
     debug_assert!(v >= 0.0);
 
-    // `Decimal::from_f32` returns `None` for non-finite values, so fall back to
-    // the input and mirror `f32::ceil` instead of panicking.
-    match Decimal::from_f32(v) {
-        Some(d) => d.ceil().to_f32().unwrap_or(v),
-        None => v,
-    }
+    Decimal::from_f32(v).unwrap().ceil().to_f32().unwrap()
 }
 
 #[cfg(any(feature = "byte", feature = "bit"))]
diff --git a/tests/byte.rs b/tests/byte.rs
index d0502c9..8687ce1 100644
--- a/tests/byte.rs
+++ b/tests/byte.rs
@@ -170,12 +170,3 @@ fn tests() {
         assert_eq!(byte, serde_json::from_str::<Byte>(case.0).unwrap(), "{i}");
     }
 }
-
-#[test]
-fn from_non_finite_returns_none() {
-    // Non-finite inputs must return None instead of panicking, in both builds.
-    assert_eq!(Byte::from_f64(f64::INFINITY), None);
-    assert_eq!(Byte::from_f64(f64::NAN), None);
-    assert_eq!(Byte::from_f32(f32::INFINITY), None);
-    assert_eq!(Byte::from_f32(f32::NAN), None);
-}