diff --git a/library/coretests/tests/floats/f128.rs b/library/coretests/tests/floats/f128.rs
index b741906a6e9e..36d6a20a9442 100644
--- a/library/coretests/tests/floats/f128.rs
+++ b/library/coretests/tests/floats/f128.rs
@@ -2,7 +2,6 @@
 #![cfg(target_has_reliable_f128)]
 
 use std::f128::consts;
-use std::num::FpCategory as Fp;
 
 use super::{assert_approx_eq, assert_biteq};
 
@@ -40,23 +39,6 @@ const NAN_MASK2: u128 = 0x00005555555555555555555555555555;
 // FIXME(f16_f128,miri): many of these have to be disabled since miri does not yet support
 // the intrinsics.
 
-#[test]
-fn test_classify() {
-    let nan: f128 = f128::NAN;
-    let inf: f128 = f128::INFINITY;
-    let neg_inf: f128 = f128::NEG_INFINITY;
-    let zero: f128 = 0.0f128;
-    let neg_zero: f128 = -0.0;
-    assert_eq!(nan.classify(), Fp::Nan);
-    assert_eq!(inf.classify(), Fp::Infinite);
-    assert_eq!(neg_inf.classify(), Fp::Infinite);
-    assert_eq!(zero.classify(), Fp::Zero);
-    assert_eq!(neg_zero.classify(), Fp::Zero);
-    assert_eq!(1f128.classify(), Fp::Normal);
-    assert_eq!(1e-4931f128.classify(), Fp::Normal);
-    assert_eq!(1e-4932f128.classify(), Fp::Subnormal);
-}
-
 #[test]
 #[cfg(any(miri, target_has_reliable_f128_math))]
 fn test_abs() {
diff --git a/library/coretests/tests/floats/f16.rs b/library/coretests/tests/floats/f16.rs
index da6414fc2444..351c008a37ba 100644
--- a/library/coretests/tests/floats/f16.rs
+++ b/library/coretests/tests/floats/f16.rs
@@ -2,7 +2,6 @@
 #![cfg(target_has_reliable_f16)]
 
 use std::f16::consts;
-use std::num::FpCategory as Fp;
 
 use super::{assert_approx_eq, assert_biteq};
 
@@ -46,23 +45,6 @@ const NAN_MASK2: u16 = 0x0155;
 // FIXME(f16_f128,miri): many of these have to be disabled since miri does not yet support
 // the intrinsics.
 
-#[test]
-fn test_classify() {
-    let nan: f16 = f16::NAN;
-    let inf: f16 = f16::INFINITY;
-    let neg_inf: f16 = f16::NEG_INFINITY;
-    let zero: f16 = 0.0f16;
-    let neg_zero: f16 = -0.0;
-    assert_eq!(nan.classify(), Fp::Nan);
-    assert_eq!(inf.classify(), Fp::Infinite);
-    assert_eq!(neg_inf.classify(), Fp::Infinite);
-    assert_eq!(zero.classify(), Fp::Zero);
-    assert_eq!(neg_zero.classify(), Fp::Zero);
-    assert_eq!(1f16.classify(), Fp::Normal);
-    assert_eq!(1e-4f16.classify(), Fp::Normal);
-    assert_eq!(1e-5f16.classify(), Fp::Subnormal);
-}
-
 #[test]
 #[cfg(any(miri, target_has_reliable_f16_math))]
 fn test_abs() {
diff --git a/library/coretests/tests/floats/f32.rs b/library/coretests/tests/floats/f32.rs
index 3464930b72f7..267b0e4e2943 100644
--- a/library/coretests/tests/floats/f32.rs
+++ b/library/coretests/tests/floats/f32.rs
@@ -1,6 +1,5 @@
 use core::f32;
 use core::f32::consts;
-use core::num::FpCategory as Fp;
 
 use super::{assert_approx_eq, assert_biteq};
 
@@ -30,23 +29,6 @@ const NAN_MASK2: u32 = 0x0055_5555;
 /// They serve as a way to get an idea of the real precision of floating point operations on different platforms.
 const APPROX_DELTA: f32 = if cfg!(miri) { 1e-4 } else { 1e-6 };
 
-#[test]
-fn test_classify() {
-    let nan: f32 = f32::NAN;
-    let inf: f32 = f32::INFINITY;
-    let neg_inf: f32 = f32::NEG_INFINITY;
-    let zero: f32 = 0.0f32;
-    let neg_zero: f32 = -0.0;
-    assert_eq!(nan.classify(), Fp::Nan);
-    assert_eq!(inf.classify(), Fp::Infinite);
-    assert_eq!(neg_inf.classify(), Fp::Infinite);
-    assert_eq!(zero.classify(), Fp::Zero);
-    assert_eq!(neg_zero.classify(), Fp::Zero);
-    assert_eq!(1f32.classify(), Fp::Normal);
-    assert_eq!(1e-37f32.classify(), Fp::Normal);
-    assert_eq!(1e-38f32.classify(), Fp::Subnormal);
-}
-
 #[test]
 fn test_abs() {
     assert_biteq!(f32::INFINITY.abs(), f32::INFINITY);
diff --git a/library/coretests/tests/floats/f64.rs b/library/coretests/tests/floats/f64.rs
index 917dae1b6c66..735b7a765151 100644
--- a/library/coretests/tests/floats/f64.rs
+++ b/library/coretests/tests/floats/f64.rs
@@ -1,6 +1,5 @@
 use core::f64;
 use core::f64::consts;
-use core::num::FpCategory as Fp;
 
 use super::{assert_approx_eq, assert_biteq};
 
@@ -25,22 +24,6 @@ const NAN_MASK1: u64 = 0x000a_aaaa_aaaa_aaaa;
 /// Second pattern over the mantissa
 const NAN_MASK2: u64 = 0x0005_5555_5555_5555;
 
-#[test]
-fn test_classify() {
-    let nan: f64 = f64::NAN;
-    let inf: f64 = f64::INFINITY;
-    let neg_inf: f64 = f64::NEG_INFINITY;
-    let zero: f64 = 0.0f64;
-    let neg_zero: f64 = -0.0;
-    assert_eq!(nan.classify(), Fp::Nan);
-    assert_eq!(inf.classify(), Fp::Infinite);
-    assert_eq!(neg_inf.classify(), Fp::Infinite);
-    assert_eq!(zero.classify(), Fp::Zero);
-    assert_eq!(neg_zero.classify(), Fp::Zero);
-    assert_eq!(1e-307f64.classify(), Fp::Normal);
-    assert_eq!(1e-308f64.classify(), Fp::Subnormal);
-}
-
 #[test]
 fn test_abs() {
     assert_biteq!(f64::INFINITY.abs(), f64::INFINITY);
diff --git a/library/coretests/tests/floats/mod.rs b/library/coretests/tests/floats/mod.rs
index b1686514a122..43431bba6954 100644
--- a/library/coretests/tests/floats/mod.rs
+++ b/library/coretests/tests/floats/mod.rs
@@ -483,6 +483,29 @@ float_test! {
     }
 }
 
+float_test! {
+    name: classify,
+    attrs: {
+        f16: #[cfg(any(miri, target_has_reliable_f16))],
+    },
+    test<Float> {
+        let nan: Float = Float::NAN;
+        let inf: Float = Float::INFINITY;
+        let neg_inf: Float = Float::NEG_INFINITY;
+        let zero: Float = 0.0;
+        let neg_zero: Float = -0.0;
+        let one: Float = 1.0;
+        assert!(matches!(nan.classify(), Fp::Nan));
+        assert!(matches!(inf.classify(), Fp::Infinite));
+        assert!(matches!(neg_inf.classify(), Fp::Infinite));
+        assert!(matches!(zero.classify(), Fp::Zero));
+        assert!(matches!(neg_zero.classify(), Fp::Zero));
+        assert!(matches!(one.classify(), Fp::Normal));
+        assert!(matches!(Float::MIN_POSITIVE_NORMAL.classify(), Fp::Normal));
+        assert!(matches!(Float::MAX_SUBNORMAL.classify(), Fp::Subnormal));
+    }
+}
+
 float_test! {
     name: min,
     attrs: {