diff --git a/lib/src/default_index_store.rs b/lib/src/default_index_store.rs
index 5502b41f5..acad29ea8 100644
--- a/lib/src/default_index_store.rs
+++ b/lib/src/default_index_store.rs
@@ -1055,7 +1055,7 @@ impl<'a> CompositeIndex<'a> {
         self.heads_pos(result)
     }
 
-    pub(crate) fn walk_revs(&self, wanted: &[CommitId], unwanted: &[CommitId]) -> RevWalk<'a> {
+    pub fn walk_revs(&self, wanted: &[CommitId], unwanted: &[CommitId]) -> RevWalk<'a> {
         let mut rev_walk = RevWalk::new(self.clone());
         for pos in wanted.iter().map(|id| self.commit_id_to_pos(id).unwrap()) {
             rev_walk.add_wanted(pos);
@@ -2759,6 +2759,7 @@ mod tests {
 
         let walk_commit_ids = |wanted: &[CommitId], unwanted: &[CommitId]| {
             index
+                .as_composite()
                 .walk_revs(wanted, unwanted)
                 .map(|entry| entry.commit_id())
                 .collect_vec()
@@ -2848,6 +2849,7 @@ mod tests {
 
         let walk_commit_ids = |wanted: &[CommitId], unwanted: &[CommitId], range: Range<u32>| {
             index
+                .as_composite()
                 .walk_revs(wanted, unwanted)
                 .filter_by_generation(range)
                 .map(|entry| entry.commit_id())
@@ -2924,6 +2926,7 @@ mod tests {
 
         let walk_commit_ids = |wanted: &[CommitId], range: Range<u32>| {
             index
+                .as_composite()
                 .walk_revs(wanted, &[])
                 .filter_by_generation(range)
                 .map(|entry| entry.commit_id())
@@ -2997,6 +3000,7 @@ mod tests {
                 .map(|id| index.as_composite().commit_id_to_pos(id).unwrap())
                 .collect_vec();
             index
+                .as_composite()
                 .walk_revs(heads, &[])
                 .descendants_filtered_by_generation(&root_positions, range)
                 .map(|entry| entry.commit_id())
diff --git a/lib/tests/test_index.rs b/lib/tests/test_index.rs
index f34a70a96..3ce375273 100644
--- a/lib/tests/test_index.rs
+++ b/lib/tests/test_index.rs
@@ -195,18 +195,21 @@ fn test_index_commits_criss_cross(use_git: bool) {
     // RevWalk deduplicates chains by entry.
     assert_eq!(
         index
+            .as_composite()
             .walk_revs(&[left_commits[num_generations - 1].id().clone()], &[])
             .count(),
         2 * num_generations
     );
     assert_eq!(
         index
+            .as_composite()
             .walk_revs(&[right_commits[num_generations - 1].id().clone()], &[])
             .count(),
         2 * num_generations
     );
     assert_eq!(
         index
+            .as_composite()
             .walk_revs(
                 &[left_commits[num_generations - 1].id().clone()],
                 &[left_commits[num_generations - 2].id().clone()]
@@ -216,6 +219,7 @@ fn test_index_commits_criss_cross(use_git: bool) {
     );
     assert_eq!(
         index
+            .as_composite()
             .walk_revs(
                 &[right_commits[num_generations - 1].id().clone()],
                 &[right_commits[num_generations - 2].id().clone()]
@@ -228,6 +232,7 @@ fn test_index_commits_criss_cross(use_git: bool) {
     // be more expensive than RevWalk, but should still finish in reasonable time.
     assert_eq!(
         index
+            .as_composite()
             .walk_revs(&[left_commits[num_generations - 1].id().clone()], &[])
             .filter_by_generation(0..(num_generations + 1) as u32)
             .count(),
@@ -235,6 +240,7 @@ fn test_index_commits_criss_cross(use_git: bool) {
     );
     assert_eq!(
         index
+            .as_composite()
             .walk_revs(&[right_commits[num_generations - 1].id().clone()], &[])
             .filter_by_generation(0..(num_generations + 1) as u32)
             .count(),
@@ -242,6 +248,7 @@ fn test_index_commits_criss_cross(use_git: bool) {
     );
     assert_eq!(
         index
+            .as_composite()
             .walk_revs(
                 &[left_commits[num_generations - 1].id().clone()],
                 &[left_commits[num_generations - 2].id().clone()]
@@ -252,6 +259,7 @@ fn test_index_commits_criss_cross(use_git: bool) {
     );
     assert_eq!(
         index
+            .as_composite()
             .walk_revs(
                 &[right_commits[num_generations - 1].id().clone()],
                 &[right_commits[num_generations - 2].id().clone()]