diff --git a/tests/certification/go.sum b/tests/certification/go.sum
index 084876035f..7ef70a2259 100644
--- a/tests/certification/go.sum
+++ b/tests/certification/go.sum
@@ -35,7 +35,7 @@ cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1
 cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
 cloud.google.com/go/iam v1.0.0 h1:hlQJMovyJJwYjZcTohUH4o1L8Z8kYz+E+W/zktiLCBc=
 cloud.google.com/go/iam v1.0.0/go.mod h1:ikbQ4f1r91wTmBmmOtBCOtuEOei6taatNXytzB7Cxew=
-cloud.google.com/go/kms v1.10.0 h1:Imrtp8792uqNP9bdfPrjtUkjjqOMBcAJ2bdFaAnLhnk=
+cloud.google.com/go/kms v1.10.1 h1:7hm1bRqGCA1GBRQUrp831TwJ9TWhP+tvLuP497CQS2g=
 cloud.google.com/go/longrunning v0.4.1 h1:v+yFJOfKC3yZdY6ZUI933pIYdhyhV8S3NpWrXWmg7jM=
 cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
 cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
diff --git a/workflows/requests.go b/workflows/requests.go
index 04b084ff18..02b7f6db3d 100644
--- a/workflows/requests.go
+++ b/workflows/requests.go
@@ -34,3 +34,8 @@ type PauseRequest struct {
 type ResumeRequest struct {
 	InstanceID string `json:"instanceID"`
 }
+
+// PurgeRequest is the object describing a Purge request.
+type PurgeRequest struct {
+	InstanceID string `json:"instanceID"`
+}
diff --git a/workflows/temporal/temporal.go b/workflows/temporal/temporal.go
index abcc66c49c..0b528c04c0 100644
--- a/workflows/temporal/temporal.go
+++ b/workflows/temporal/temporal.go
@@ -149,6 +149,11 @@ func (c *TemporalWF) RaiseEvent(ctx context.Context, req *workflows.RaiseEventRe
 	return c.client.SignalWorkflow(ctx, req.InstanceID, "", req.EventName, decodedEventData)
 }
 
+func (c *TemporalWF) Purge(ctx context.Context, req *workflows.PurgeRequest) error {
+	// Unimplemented
+	return nil
+}
+
 func (c *TemporalWF) Close() {
 	c.client.Close()
 }
diff --git a/workflows/workflow.go b/workflows/workflow.go
index 5d45a9f7fc..1dee2ba398 100644
--- a/workflows/workflow.go
+++ b/workflows/workflow.go
@@ -27,6 +27,7 @@ type Workflow interface {
 	Terminate(ctx context.Context, req *TerminateRequest) error
 	Get(ctx context.Context, req *GetRequest) (*StateResponse, error)
 	RaiseEvent(ctx context.Context, req *RaiseEventRequest) error
+	Purge(ctx context.Context, req *PurgeRequest) error
 	Pause(ctx context.Context, req *PauseRequest) error
 	Resume(ctx context.Context, req *ResumeRequest) error
 	GetComponentMetadata() map[string]string