diff --git a/src/presets.rs b/src/presets.rs
index 6a25cb5..bc6023e 100644
--- a/src/presets.rs
+++ b/src/presets.rs
@@ -192,7 +192,7 @@ fn _is_prime_with_rng<T: Integer + RandomMod>(rng: &mut impl CryptoRngCore, num:
 
 #[cfg(test)]
 mod tests {
-    use crypto_bigint::{CheckedAdd, Uint, Word, U128, U64};
+    use crypto_bigint::{BoxedUint, CheckedAdd, Uint, Word, U128, U64};
     use num_prime::nt_funcs::is_prime64;
     use rand_core::OsRng;
 
@@ -279,6 +279,15 @@ mod tests {
         }
     }
 
+    #[test]
+    fn prime_generation_boxed() {
+        for bit_length in (28..=128).step_by(10) {
+            let p: BoxedUint = generate_prime(bit_length, 128);
+            assert!(p.bits_vartime() == bit_length);
+            assert!(is_prime(&p));
+        }
+    }
+
     #[test]
     fn safe_prime_generation() {
         for bit_length in (28..=128).step_by(10) {
@@ -288,6 +297,15 @@ mod tests {
         }
     }
 
+    #[test]
+    fn safe_prime_generation_boxed() {
+        for bit_length in (28..=128).step_by(10) {
+            let p: BoxedUint = generate_safe_prime(bit_length, 128);
+            assert!(p.bits_vartime() == bit_length);
+            assert!(is_safe_prime(&p));
+        }
+    }
+
     #[test]
     fn corner_cases_is_prime() {
         for num in 0u64..30 {