diff --git a/roaring/src/bitmap/arbitrary.rs b/roaring/src/bitmap/arbitrary.rs
index a8ca25be..6bb8b356 100644
--- a/roaring/src/bitmap/arbitrary.rs
+++ b/roaring/src/bitmap/arbitrary.rs
@@ -189,7 +189,7 @@ mod test {
 
     impl RoaringBitmap {
         prop_compose! {
-            pub fn arbitrary()(bitmap in (0usize..=16).prop_flat_map(containers)) -> RoaringBitmap {
+            pub(crate) fn arbitrary()(bitmap in (0usize..=16).prop_flat_map(containers)) -> RoaringBitmap {
                 bitmap
             }
         }
diff --git a/roaring/src/treemap/arbitrary.rs b/roaring/src/treemap/arbitrary.rs
index c7adb7d5..6c8e096a 100644
--- a/roaring/src/treemap/arbitrary.rs
+++ b/roaring/src/treemap/arbitrary.rs
@@ -6,7 +6,7 @@ mod test {
 
     impl RoaringTreemap {
         prop_compose! {
-            pub fn arbitrary()(map in btree_map(0u32..=16, RoaringBitmap::arbitrary(), 0usize..=16)) -> RoaringTreemap {
+            pub(crate) fn arbitrary()(map in btree_map(0u32..=16, RoaringBitmap::arbitrary(), 0usize..=16)) -> RoaringTreemap {
                 // we’re NEVER supposed to start with a treemap containing empty bitmaps
                 // Since we can’t configure this in arbitrary we’re simply going to ignore the generated empty bitmaps
                 let map = map.into_iter().filter(|(_, v)| !v.is_empty()).collect();