diff --git a/internal/api/client.go b/internal/api/client.go
index d3cfd67..5d69d96 100644
--- a/internal/api/client.go
+++ b/internal/api/client.go
@@ -45,6 +45,8 @@ type Client interface {
 	MustBackpaginate(t *testing.T, roomID string, count int)
 	// MustGetEvent will return the client's view of this event, or fail the test if the event cannot be found.
 	MustGetEvent(t *testing.T, roomID, eventID string) Event
+	// MustBackupKeys will backup E2EE keys using the password provided, else fail the test.
+	MustBackupKeys(t *testing.T, password string)
 	// Log something to stdout and the underlying client log file
 	Logf(t *testing.T, format string, args ...interface{})
 	// The user for this client
@@ -96,6 +98,12 @@ func (c *LoggedClient) MustBackpaginate(t *testing.T, roomID string, count int)
 	c.Client.MustBackpaginate(t, roomID, count)
 }
 
+func (c *LoggedClient) MustBackupKeys(t *testing.T, password string) {
+	t.Helper()
+	c.Logf(t, "%s MustBackupKeys password=%s", c.logPrefix(), password)
+	c.Client.MustBackupKeys(t, password)
+}
+
 func (c *LoggedClient) logPrefix() string {
 	return fmt.Sprintf("[%s](%s)", c.UserID(), c.Type())
 }
diff --git a/internal/api/js.go b/internal/api/js.go
index d29d90d..c839c55 100644
--- a/internal/api/js.go
+++ b/internal/api/js.go
@@ -298,6 +298,10 @@ func (c *JSClient) MustBackpaginate(t *testing.T, roomID string, count int) {
 	))
 }
 
+func (c *JSClient) MustBackupKeys(t *testing.T, password string) {
+
+}
+
 func (c *JSClient) WaitUntilEventInRoom(t *testing.T, roomID string, checker func(e Event) bool) Waiter {
 	t.Helper()
 	return &jsTimelineWaiter{
diff --git a/internal/api/rust.go b/internal/api/rust.go
index f40ba09..c834d53 100644
--- a/internal/api/rust.go
+++ b/internal/api/rust.go
@@ -139,6 +139,9 @@ func (c *RustClient) IsRoomEncrypted(t *testing.T, roomID string) (bool, error)
 	return r.IsEncrypted()
 }
 
+func (c *RustClient) MustBackupKeys(t *testing.T, password string) {
+}
+
 func (c *RustClient) WaitUntilEventInRoom(t *testing.T, roomID string, checker func(Event) bool) Waiter {
 	t.Helper()
 	c.ensureListening(t, roomID)