diff --git a/in_toto/envelope_test.go b/in_toto/envelope_test.go
index a7484282..a76db359 100644
--- a/in_toto/envelope_test.go
+++ b/in_toto/envelope_test.go
@@ -199,3 +199,33 @@ func TestEnvelopeSign(t *testing.T) {
 	assert.Equal(t, "be6371bc627318218191ce0780fd3183cce6c36da02938a477d2e4dfae1804a6", env.envelope.Signatures[0].KeyID)
 	assert.Equal(t, "HeacKZDQD+EIYz1dLJ2NpXxcG70tn62BOzcxnAArFSKJcWIL0qcyzvdtpSJQ0pOyq8lBxMk5nIRO0Kr89SZoBA==", env.envelope.Signatures[0].Sig)
 }
+
+func TestEnvelopeGetSignatureForKeyID(t *testing.T) {
+	env := &Envelope{
+		envelope: &dsse.Envelope{
+			PayloadType: PayloadType,
+			Payload:     "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",
+			Signatures: []dsse.Signature{
+				{
+					KeyID: "testKeyID1",
+					Sig:   "dummy sig 1",
+				},
+				{
+					KeyID: "testKeyID2",
+					Sig:   "dummy sig 2",
+				},
+			},
+		},
+	}
+
+	sig, err := env.GetSignatureForKeyID("testKeyID1")
+	assert.Nil(t, err)
+	assert.Equal(t, Signature{KeyID: "testKeyID1", Sig: "dummy sig 1"}, sig)
+
+	sig, err = env.GetSignatureForKeyID("testKeyID2")
+	assert.Nil(t, err)
+	assert.Equal(t, Signature{KeyID: "testKeyID2", Sig: "dummy sig 2"}, sig)
+
+	_, err = env.GetSignatureForKeyID("unknown")
+	assert.ErrorContains(t, err, "no signature found for key")
+}