diff --git a/mockfs/mockfs.go b/mockfs/mockfs.go
index 8221604..d1711d8 100644
--- a/mockfs/mockfs.go
+++ b/mockfs/mockfs.go
@@ -78,8 +78,9 @@ func newMockFS(t testing.TB, dirs []string, excludePattern string) *MockFS {
 	}
 }
 
-func (m *MockFS) DB() *db.DB     { return m.db }
-func (m *MockFS) TmpDir() string { return m.dir }
+func (m *MockFS) DB() *db.DB             { return m.db }
+func (m *MockFS) TmpDir() string         { return m.dir }
+func (m *MockFS) TagReader() tags.Reader { return m.tagReader }
 
 func (m *MockFS) ScanAndClean() *scanner.Context {
 	ctx, err := m.scanner.ScanAndClean(scanner.ScanOptions{})