diff --git a/libm-test/src/precision.rs b/libm-test/src/precision.rs
index 3fb8c1b37..c441922d3 100644
--- a/libm-test/src/precision.rs
+++ b/libm-test/src/precision.rs
@@ -1,8 +1,6 @@
 //! Configuration for skipping or changing the result for individual test cases (inputs) rather
 //! than ignoring entire tests.
 
-use core::f32;
-
 use CheckBasis::{Mpfr, Musl};
 use libm::support::CastFrom;
 use {BaseName as Bn, Identifier as Id};
diff --git a/libm/src/math/atan.rs b/libm/src/math/atan.rs
index 0590ba87c..a303ebd42 100644
--- a/libm/src/math/atan.rs
+++ b/libm/src/math/atan.rs
@@ -29,8 +29,6 @@
  * to produce the hexadecimal values shown.
  */
 
-use core::f64;
-
 use super::fabs;
 
 const ATANHI: [f64; 4] = [
@@ -134,19 +132,19 @@ pub fn atan(x: f64) -> f64 {
 
 #[cfg(test)]
 mod tests {
-    use core::f64;
+    use core::f64::consts;
 
     use super::atan;
 
     #[test]
     fn sanity_check() {
         for (input, answer) in [
-            (3.0_f64.sqrt() / 3.0, f64::consts::FRAC_PI_6),
-            (1.0, f64::consts::FRAC_PI_4),
-            (3.0_f64.sqrt(), f64::consts::FRAC_PI_3),
-            (-3.0_f64.sqrt() / 3.0, -f64::consts::FRAC_PI_6),
-            (-1.0, -f64::consts::FRAC_PI_4),
-            (-3.0_f64.sqrt(), -f64::consts::FRAC_PI_3),
+            (3.0_f64.sqrt() / 3.0, consts::FRAC_PI_6),
+            (1.0, consts::FRAC_PI_4),
+            (3.0_f64.sqrt(), consts::FRAC_PI_3),
+            (-3.0_f64.sqrt() / 3.0, -consts::FRAC_PI_6),
+            (-1.0, -consts::FRAC_PI_4),
+            (-3.0_f64.sqrt(), -consts::FRAC_PI_3),
         ]
         .iter()
         {
@@ -167,12 +165,12 @@ mod tests {
 
     #[test]
     fn infinity() {
-        assert_eq!(atan(f64::INFINITY), f64::consts::FRAC_PI_2);
+        assert_eq!(atan(f64::INFINITY), consts::FRAC_PI_2);
     }
 
     #[test]
     fn minus_infinity() {
-        assert_eq!(atan(f64::NEG_INFINITY), -f64::consts::FRAC_PI_2);
+        assert_eq!(atan(f64::NEG_INFINITY), -consts::FRAC_PI_2);
     }
 
     #[test]
diff --git a/libm/src/math/cbrtf.rs b/libm/src/math/cbrtf.rs
index 9d6958483..6916ca673 100644
--- a/libm/src/math/cbrtf.rs
+++ b/libm/src/math/cbrtf.rs
@@ -17,8 +17,6 @@
  * Return cube root of x
  */
 
-use core::f32;
-
 const B1: u32 = 709958130; /* B1 = (127-127.0/3-0.03306235651)*2**23 */
 const B2: u32 = 642849266; /* B2 = (127-127.0/3-24/3-0.03306235651)*2**23 */
 
diff --git a/libm/src/math/expm1.rs b/libm/src/math/expm1.rs
index 3714bf3af..3ce1d886b 100644
--- a/libm/src/math/expm1.rs
+++ b/libm/src/math/expm1.rs
@@ -10,8 +10,6 @@
  * ====================================================
  */
 
-use core::f64;
-
 const O_THRESHOLD: f64 = 7.09782712893383973096e+02; /* 0x40862E42, 0xFEFA39EF */
 const LN2_HI: f64 = 6.93147180369123816490e-01; /* 0x3fe62e42, 0xfee00000 */
 const LN2_LO: f64 = 1.90821492927058770002e-10; /* 0x3dea39ef, 0x35793c76 */
diff --git a/libm/src/math/hypot.rs b/libm/src/math/hypot.rs
index b92ee18ca..c0b2a1937 100644
--- a/libm/src/math/hypot.rs
+++ b/libm/src/math/hypot.rs
@@ -1,5 +1,3 @@
-use core::f64;
-
 use super::sqrt;
 
 const SPLIT: f64 = 134217728. + 1.; // 0x1p27 + 1 === (2 ^ 27) + 1
diff --git a/libm/src/math/hypotf.rs b/libm/src/math/hypotf.rs
index e7635ffc9..dfb36d4b2 100644
--- a/libm/src/math/hypotf.rs
+++ b/libm/src/math/hypotf.rs
@@ -1,5 +1,3 @@
-use core::f32;
-
 use super::sqrtf;
 
 #[cfg_attr(assert_no_panic, no_panic::no_panic)]
diff --git a/libm/src/math/log10.rs b/libm/src/math/log10.rs
index 29f25d944..228c00a5b 100644
--- a/libm/src/math/log10.rs
+++ b/libm/src/math/log10.rs
@@ -17,8 +17,6 @@
  *    log10(x) = (f - f*f/2 + r)/log(10) + k*log10(2)
  */
 
-use core::f64;
-
 const IVLN10HI: f64 = 4.34294481878168880939e-01; /* 0x3fdbcb7b, 0x15200000 */
 const IVLN10LO: f64 = 2.50829467116452752298e-11; /* 0x3dbb9438, 0xca9aadd5 */
 const LOG10_2HI: f64 = 3.01029995663611771306e-01; /* 0x3FD34413, 0x509F6000 */
diff --git a/libm/src/math/log10f.rs b/libm/src/math/log10f.rs
index f89584bf9..f72fcf9e1 100644
--- a/libm/src/math/log10f.rs
+++ b/libm/src/math/log10f.rs
@@ -13,8 +13,6 @@
  * See comments in log10.c.
  */
 
-use core::f32;
-
 const IVLN10HI: f32 = 4.3432617188e-01; /* 0x3ede6000 */
 const IVLN10LO: f32 = -3.1689971365e-05; /* 0xb804ead9 */
 const LOG10_2HI: f32 = 3.0102920532e-01; /* 0x3e9a2080 */
diff --git a/libm/src/math/log1p.rs b/libm/src/math/log1p.rs
index c991cce60..c2f9eb89b 100644
--- a/libm/src/math/log1p.rs
+++ b/libm/src/math/log1p.rs
@@ -53,8 +53,6 @@
  *       See HP-15C Advanced Functions Handbook, p.193.
  */
 
-use core::f64;
-
 const LN2_HI: f64 = 6.93147180369123816490e-01; /* 3fe62e42 fee00000 */
 const LN2_LO: f64 = 1.90821492927058770002e-10; /* 3dea39ef 35793c76 */
 const LG1: f64 = 6.666666666666735130e-01; /* 3FE55555 55555593 */
diff --git a/libm/src/math/log1pf.rs b/libm/src/math/log1pf.rs
index 89a92fac9..2e4775b8d 100644
--- a/libm/src/math/log1pf.rs
+++ b/libm/src/math/log1pf.rs
@@ -10,8 +10,6 @@
  * ====================================================
  */
 
-use core::f32;
-
 const LN2_HI: f32 = 6.9313812256e-01; /* 0x3f317180 */
 const LN2_LO: f32 = 9.0580006145e-06; /* 0x3717f7d1 */
 /* |(log(1+s)-log(1-s))/s - Lg(s)| < 2**-34.24 (~[-4.95e-11, 4.97e-11]). */
diff --git a/libm/src/math/log2.rs b/libm/src/math/log2.rs
index 9b750c9a2..0f72fe0b8 100644
--- a/libm/src/math/log2.rs
+++ b/libm/src/math/log2.rs
@@ -17,8 +17,6 @@
  *    log2(x) = (f - f*f/2 + r)/log(2) + k
  */
 
-use core::f64;
-
 const IVLN2HI: f64 = 1.44269504072144627571e+00; /* 0x3ff71547, 0x65200000 */
 const IVLN2LO: f64 = 1.67517131648865118353e-10; /* 0x3de705fc, 0x2eefa200 */
 const LG1: f64 = 6.666666666666735130e-01; /* 3FE55555 55555593 */
diff --git a/libm/src/math/log2f.rs b/libm/src/math/log2f.rs
index 0e5177d7a..78673675a 100644
--- a/libm/src/math/log2f.rs
+++ b/libm/src/math/log2f.rs
@@ -13,8 +13,6 @@
  * See comments in log2.c.
  */
 
-use core::f32;
-
 const IVLN2HI: f32 = 1.4428710938e+00; /* 0x3fb8b000 */
 const IVLN2LO: f32 = -1.7605285393e-04; /* 0xb9389ad4 */
 /* |(log(1+s)-log(1-s))/s - Lg(s)| < 2**-34.24 (~[-4.95e-11, 4.97e-11]). */
diff --git a/libm/src/math/rem_pio2f.rs b/libm/src/math/rem_pio2f.rs
index 0472a1035..481f7ee83 100644
--- a/libm/src/math/rem_pio2f.rs
+++ b/libm/src/math/rem_pio2f.rs
@@ -14,8 +14,6 @@
  * ====================================================
  */
 
-use core::f64;
-
 use super::rem_pio2_large;
 
 const TOINT: f64 = 1.5 / f64::EPSILON;