diff --git a/e2e/dnschallenge/dns_challenges_test.go b/e2e/dnschallenge/dns_challenges_test.go
index 5d91f1cfa..afa7e97cf 100644
--- a/e2e/dnschallenge/dns_challenges_test.go
+++ b/e2e/dnschallenge/dns_challenges_test.go
@@ -94,6 +94,8 @@ func TestChallengeDNS_Client_Obtain(t *testing.T) {
 	client, err := lego.NewClient(config)
 	require.NoError(t, err)
 
+	t.Setenv("EXEC_SEQUENCE_INTERVAL", "5")
+
 	provider, err := dns.NewDNSChallengeProviderByName("exec")
 	require.NoError(t, err)
 
@@ -154,6 +156,8 @@ func TestChallengeDNS_Client_Obtain_profile(t *testing.T) {
 	client, err := lego.NewClient(config)
 	require.NoError(t, err)
 
+	t.Setenv("EXEC_SEQUENCE_INTERVAL", "5")
+
 	provider, err := dns.NewDNSChallengeProviderByName("exec")
 	require.NoError(t, err)