diff --git a/server/mock/store_test.go b/server/mock/store_test.go
index cb8fca7bc8..5a8a1189a3 100644
--- a/server/mock/store_test.go
+++ b/server/mock/store_test.go
@@ -38,4 +38,5 @@ func TestMultiStore(t *testing.T) {
 	store := multiStore{}
 	require.Panics(t, func() { store.Snapshot(1, nil) }, "Snapshot should panic")
 	require.Panics(t, func() { store.Restore(1, 1, nil) }, "Restore should panic")
+	require.Panics(t, func() { store.SetIAVLDisableFastNode(false) }, "SetIAVLDisableFastNode should panic")
 }
diff --git a/store/iavl/tree_test.go b/store/iavl/tree_test.go
index b9f4c4c573..a1bb25aa8a 100644
--- a/store/iavl/tree_test.go
+++ b/store/iavl/tree_test.go
@@ -15,9 +15,10 @@ func TestImmutableTreePanics(t *testing.T) {
 	it := &immutableTree{immTree}
 	require.Panics(t, func() { it.Set([]byte{}, []byte{}) })
 	require.Panics(t, func() { it.Remove([]byte{}) })
-	require.Panics(t, func() { it.SaveVersion() })                       // nolint:errcheck
-	require.Panics(t, func() { it.DeleteVersion(int64(1)) })             // nolint:errcheck
-	require.Panics(t, func() { it.LoadVersionForOverwriting(int64(1)) }) // nolint:errcheck
+	require.Panics(t, func() { it.SaveVersion() })           // nolint:errcheck
+	require.Panics(t, func() { it.DeleteVersion(int64(1)) }) // nolint:errcheck
+	require.Panics(t, func() { it.LoadVersionForOverwriting(int64(1)) })
+	require.Equal(t, it.AvailableVersions(), []int{})
 
 	val, err := it.GetVersioned(nil, 1)
 	require.Error(t, err)