diff --git a/src/distributions/gamma.rs b/src/distributions/gamma.rs
index 26568924ef9..90f07cedfae 100644
--- a/src/distributions/gamma.rs
+++ b/src/distributions/gamma.rs
@@ -304,9 +304,6 @@ mod test {
     use distributions::Distribution;
     use super::{Beta, ChiSquared, StudentT, FisherF};
 
-    #[cfg(not(miri))] // Miri is too slow
-    const N: u32 = 1000;
-    #[cfg(miri)]
     const N: u32 = 100;
 
     #[test]
diff --git a/src/distributions/poisson.rs b/src/distributions/poisson.rs
index 48b0d6c4f46..22b7e76baa8 100644
--- a/src/distributions/poisson.rs
+++ b/src/distributions/poisson.rs
@@ -108,20 +108,16 @@ mod test {
     use distributions::Distribution;
     use super::Poisson;
 
-    #[cfg(not(miri))] // Miri is too slow
-    const N: u32 = 1000;
-    #[cfg(miri)]
-    const N: u32 = 100;
-
     #[test]
+    #[cfg(not(miri))] // Miri is too slow
     fn test_poisson_10() {
         let poisson = Poisson::new(10.0);
         let mut rng = ::test::rng(123);
         let mut sum = 0;
-        for _ in 0..N {
+        for _ in 0..1000 {
             sum += poisson.sample(&mut rng);
         }
-        let avg = (sum as f64) / (N as f64);
+        let avg = (sum as f64) / 1000.0;
         println!("Poisson average: {}", avg);
         assert!((avg - 10.0).abs() < 0.5); // not 100% certain, but probable enough
     }
@@ -133,10 +129,10 @@ mod test {
         let poisson = Poisson::new(15.0);
         let mut rng = ::test::rng(123);
         let mut sum = 0;
-        for _ in 0..N {
+        for _ in 0..1000 {
             sum += poisson.sample(&mut rng);
         }
-        let avg = (sum as f64) / (N as f64);
+        let avg = (sum as f64) / 1000.0;
         println!("Poisson average: {}", avg);
         assert!((avg - 15.0).abs() < 0.5); // not 100% certain, but probable enough
     }