diff --git a/runtimes/google/ipc/full_test.go b/runtimes/google/ipc/full_test.go
index 2d7a6a0..3a5a222 100644
--- a/runtimes/google/ipc/full_test.go
+++ b/runtimes/google/ipc/full_test.go
@@ -242,6 +242,10 @@
 	return nil, nil
 }
 
+func (ns *namespace) FlushCacheEntry(name string) bool {
+	return false
+}
+
 func (ns *namespace) Glob(ctx context.T, pattern string) (chan naming.MountEntry, error) {
 	panic("Glob not implemented")
 	return nil, nil
diff --git a/services/mounttable/lib/mounttable_test.go b/services/mounttable/lib/mounttable_test.go
index 5b60408..220f25e 100644
--- a/services/mounttable/lib/mounttable_test.go
+++ b/services/mounttable/lib/mounttable_test.go
@@ -96,6 +96,10 @@
 	return nil, errors.New("ResolveToMountTable is not implemented in this MountTable")
 }
 
+func (stupidNS) FlushCacheEntry(name string) bool {
+	return false
+}
+
 // Glob implements naming.MountTable.Glob.
 func (stupidNS) Glob(ctx context.T, pattern string) (chan naming.MountEntry, error) {
 	return nil, errors.New("Glob is not implemented in this MountTable")