diff --git a/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h b/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
index ce979cf..062e00b 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
@@ -170,9 +170,8 @@
     bool MapSnapshot(LockedFile* lock, const std::string& name, const std::string& base_device,
                      const std::chrono::milliseconds& timeout_ms, std::string* dev_path);
 
-    // Remove the backing copy-on-write image for the named snapshot. If the
-    // device is still mapped, this will attempt an Unmap, and fail if the
-    // unmap fails.
+    // Remove the backing copy-on-write image for the named snapshot. The
+    // caller is responsible for ensuring that the snapshot is unmapped.
     bool DeleteSnapshot(LockedFile* lock, const std::string& name);
 
     // Unmap a snapshot device previously mapped with MapSnapshotDevice().
diff --git a/fs_mgr/libsnapshot/snapshot.cpp b/fs_mgr/libsnapshot/snapshot.cpp
index c982dd1..ef56179 100644
--- a/fs_mgr/libsnapshot/snapshot.cpp
+++ b/fs_mgr/libsnapshot/snapshot.cpp
@@ -300,11 +300,6 @@
     CHECK(lock);
     if (!EnsureImageManager()) return false;
 
-    if (!UnmapSnapshot(lock, name)) {
-        LOG(ERROR) << "Snapshot could not be unmapped for deletion: " << name;
-        return false;
-    }
-
     // Take the snapshot's lock after Unmap, since it will also try to lock.
     auto status_file = OpenSnapshotStatusFile(name, O_RDONLY, LOCK_EX);
     if (!status_file) return false;
diff --git a/fs_mgr/libsnapshot/snapshot_test.cpp b/fs_mgr/libsnapshot/snapshot_test.cpp
index 1b3289b..9cc9bd7 100644
--- a/fs_mgr/libsnapshot/snapshot_test.cpp
+++ b/fs_mgr/libsnapshot/snapshot_test.cpp
@@ -104,7 +104,7 @@
     ASSERT_EQ(snapshots.size(), 1);
     ASSERT_EQ(snapshots[0], "test-snapshot");
 
-    // Scope so delete can re-acquire the status file lock.
+    // Scope so delete can re-acquire the snapshot file lock.
     {
         auto file = sm->OpenSnapshotStatusFile("test-snapshot", O_RDONLY, LOCK_SH);
         ASSERT_NE(file, nullptr);
@@ -116,6 +116,7 @@
         ASSERT_EQ(status.snapshot_size, kDeviceSize);
     }
 
+    ASSERT_TRUE(sm->UnmapSnapshot(lock_.get(), "test-snapshot"));
     ASSERT_TRUE(sm->DeleteSnapshot(lock_.get(), "test-snapshot"));
 }