diff --git a/library/coretests/tests/floats/f128.rs b/library/coretests/tests/floats/f128.rs
index 5e62eb7b7c59..c173d7f0ae01 100644
--- a/library/coretests/tests/floats/f128.rs
+++ b/library/coretests/tests/floats/f128.rs
@@ -1,18 +1,18 @@
 // FIXME(f16_f128): only tested on platforms that have symbols and aren't buggy
 #![cfg(target_has_reliable_f128)]
 
-use std::f128::consts;
-
 use super::{assert_approx_eq, assert_biteq};
 
 // Note these tolerances make sense around zero, but not for more extreme exponents.
 
 /// Default tolerances. Works for values that should be near precise but not exact. Roughly
 /// the precision carried by `100 * 100`.
+#[allow(unused)]
 const TOL: f128 = 1e-12;
 
 /// For operations that are near exact, usually not involving math of different
 /// signs.
+#[allow(unused)]
 const TOL_PRECISE: f128 = 1e-28;
 
 /// First pattern over the mantissa
@@ -52,23 +52,6 @@ fn test_max_recip() {
     );
 }
 
-#[test]
-fn test_to_radians() {
-    let pi: f128 = consts::PI;
-    let nan: f128 = f128::NAN;
-    let inf: f128 = f128::INFINITY;
-    let neg_inf: f128 = f128::NEG_INFINITY;
-    assert_biteq!(0.0f128.to_radians(), 0.0);
-    assert_approx_eq!(154.6f128.to_radians(), 2.6982790235832334267135442069489767804, TOL);
-    assert_approx_eq!((-332.31f128).to_radians(), -5.7999036373023566567593094812182763013, TOL);
-    // check approx rather than exact because round trip for pi doesn't fall on an exactly
-    // representable value (unlike `f32` and `f64`).
-    assert_approx_eq!(180.0f128.to_radians(), pi, TOL_PRECISE);
-    assert!(nan.to_radians().is_nan());
-    assert_biteq!(inf.to_radians(), inf);
-    assert_biteq!(neg_inf.to_radians(), neg_inf);
-}
-
 #[test]
 fn test_float_bits_conv() {
     assert_eq!((1f128).to_bits(), 0x3fff0000000000000000000000000000);
diff --git a/library/coretests/tests/floats/f16.rs b/library/coretests/tests/floats/f16.rs
index f172e9cb508c..c12de7221baa 100644
--- a/library/coretests/tests/floats/f16.rs
+++ b/library/coretests/tests/floats/f16.rs
@@ -1,8 +1,6 @@
 // FIXME(f16_f128): only tested on platforms that have symbols and aren't buggy
 #![cfg(target_has_reliable_f16)]
 
-use std::f16::consts;
-
 use super::{assert_approx_eq, assert_biteq};
 
 /// Tolerance for results on the order of 10.0e-2
@@ -54,21 +52,6 @@ fn test_max_recip() {
     assert_approx_eq!(f16::MAX.recip(), 1.526624e-5f16, 1e-4);
 }
 
-#[test]
-fn test_to_radians() {
-    let pi: f16 = consts::PI;
-    let nan: f16 = f16::NAN;
-    let inf: f16 = f16::INFINITY;
-    let neg_inf: f16 = f16::NEG_INFINITY;
-    assert_biteq!(0.0f16.to_radians(), 0.0);
-    assert_approx_eq!(154.6f16.to_radians(), 2.698279, TOL_0);
-    assert_approx_eq!((-332.31f16).to_radians(), -5.799903, TOL_0);
-    assert_approx_eq!(180.0f16.to_radians(), pi, TOL_0);
-    assert!(nan.to_radians().is_nan());
-    assert_biteq!(inf.to_radians(), inf);
-    assert_biteq!(neg_inf.to_radians(), neg_inf);
-}
-
 #[test]
 fn test_float_bits_conv() {
     assert_eq!((1f16).to_bits(), 0x3c00);
diff --git a/library/coretests/tests/floats/f32.rs b/library/coretests/tests/floats/f32.rs
index c439dfed33ca..b79295f470de 100644
--- a/library/coretests/tests/floats/f32.rs
+++ b/library/coretests/tests/floats/f32.rs
@@ -1,5 +1,4 @@
 use core::f32;
-use core::f32::consts;
 
 use super::{assert_approx_eq, assert_biteq};
 
@@ -27,21 +26,6 @@ fn test_mul_add() {
     assert_biteq!(f32::math::mul_add(-3.2f32, 2.4, neg_inf), neg_inf);
 }
 
-#[test]
-fn test_to_radians() {
-    let pi: f32 = consts::PI;
-    let nan: f32 = f32::NAN;
-    let inf: f32 = f32::INFINITY;
-    let neg_inf: f32 = f32::NEG_INFINITY;
-    assert_biteq!(0.0f32.to_radians(), 0.0);
-    assert_approx_eq!(154.6f32.to_radians(), 2.698279);
-    assert_approx_eq!((-332.31f32).to_radians(), -5.799903);
-    assert_biteq!(180.0f32.to_radians(), pi);
-    assert!(nan.to_radians().is_nan());
-    assert_biteq!(inf.to_radians(), inf);
-    assert_biteq!(neg_inf.to_radians(), neg_inf);
-}
-
 #[test]
 fn test_float_bits_conv() {
     assert_eq!((1f32).to_bits(), 0x3f800000);
diff --git a/library/coretests/tests/floats/f64.rs b/library/coretests/tests/floats/f64.rs
index 10ea901e930c..a25405863286 100644
--- a/library/coretests/tests/floats/f64.rs
+++ b/library/coretests/tests/floats/f64.rs
@@ -1,5 +1,4 @@
 use core::f64;
-use core::f64::consts;
 
 use super::{assert_approx_eq, assert_biteq};
 
@@ -27,21 +26,6 @@ fn test_mul_add() {
     assert_biteq!((-3.2f64).mul_add(2.4, neg_inf), neg_inf);
 }
 
-#[test]
-fn test_to_radians() {
-    let pi: f64 = consts::PI;
-    let nan: f64 = f64::NAN;
-    let inf: f64 = f64::INFINITY;
-    let neg_inf: f64 = f64::NEG_INFINITY;
-    assert_biteq!(0.0f64.to_radians(), 0.0);
-    assert_approx_eq!(154.6f64.to_radians(), 2.698279);
-    assert_approx_eq!((-332.31f64).to_radians(), -5.799903);
-    assert_biteq!(180.0f64.to_radians(), pi);
-    assert!(nan.to_radians().is_nan());
-    assert_biteq!(inf.to_radians(), inf);
-    assert_biteq!(neg_inf.to_radians(), neg_inf);
-}
-
 #[test]
 fn test_float_bits_conv() {
     assert_eq!((1f64).to_bits(), 0x3ff0000000000000);
diff --git a/library/coretests/tests/floats/mod.rs b/library/coretests/tests/floats/mod.rs
index 8c939f8037dd..5f59cb9cce37 100644
--- a/library/coretests/tests/floats/mod.rs
+++ b/library/coretests/tests/floats/mod.rs
@@ -8,6 +8,8 @@ trait TestableFloat: Sized {
     const APPROX: Self;
     /// Allow looser tolerance for f32 on miri
     const POWI_APPROX: Self = Self::APPROX;
+    /// Allow looser tolerance for f16
+    const _180_TO_RADIANS_APPROX: Self = Self::APPROX;
     /// Allow for looser tolerance for f16
     const PI_TO_DEGREES_APPROX: Self = Self::APPROX;
     const ZERO: Self;
@@ -30,6 +32,7 @@ trait TestableFloat: Sized {
 impl TestableFloat for f16 {
     type Int = u16;
     const APPROX: Self = 1e-3;
+    const _180_TO_RADIANS_APPROX: Self = 1e-2;
     const PI_TO_DEGREES_APPROX: Self = 0.125;
     const ZERO: Self = 0.0;
     const ONE: Self = 1.0;
@@ -1416,3 +1419,24 @@ float_test! {
         assert_biteq!((1.0 as Float).to_degrees(), 57.2957795130823208767981548141051703);
     }
 }
+
+float_test! {
+    name: to_radians,
+    attrs: {
+        f16: #[cfg(target_has_reliable_f16)],
+        f128: #[cfg(target_has_reliable_f128)],
+    },
+    test<Float> {
+        let pi: Float = Float::PI;
+        let nan: Float = Float::NAN;
+        let inf: Float = Float::INFINITY;
+        let neg_inf: Float = Float::NEG_INFINITY;
+        assert_biteq!((0.0 as Float).to_radians(), 0.0);
+        assert_approx_eq!((154.6 as Float).to_radians(), 2.6982790235832334267135442069489767804);
+        assert_approx_eq!((-332.31 as Float).to_radians(), -5.7999036373023566567593094812182763013);
+        assert_approx_eq!((180.0 as Float).to_radians(), pi, Float::_180_TO_RADIANS_APPROX);
+        assert!(nan.to_radians().is_nan());
+        assert_biteq!(inf.to_radians(), inf);
+        assert_biteq!(neg_inf.to_radians(), neg_inf);
+    }
+}