diff --git a/lib/vquic/curl_ngtcp2.c b/lib/vquic/curl_ngtcp2.c
index 3493f996ce..f72f6630f5 100644
--- a/lib/vquic/curl_ngtcp2.c
+++ b/lib/vquic/curl_ngtcp2.c
@@ -457,17 +457,6 @@ static void quic_settings(struct cf_ngtcp2_ctx *ctx,
                           struct Curl_easy *data,
                           struct pkt_io_ctx *pktx)
 {
-#ifdef NGTCP2_SETTINGS_V2x
-static uint16_t mtu_probes[] = {
-  1472, /* what h2o offers */
-  1452, /* what Caddy offers */
-  1454 - 48, /* The well known MTU used by a domestic optic fiber
-                service in Japan. */
-  1390 - 48, /* Typical Tunneled MTU */
-  1280 - 48, /* IPv6 minimum MTU */
-  1492 - 48, /* PPPoE */
-};
-#endif
   ngtcp2_settings *s = &ctx->settings;
   ngtcp2_transport_params *t = &ctx->transport_params;
 
@@ -485,12 +474,11 @@ static uint16_t mtu_probes[] = {
   s->max_window = 100 * ctx->max_stream_window;
   s->max_stream_window = 10 * ctx->max_stream_window;
   s->no_pmtud = FALSE;
-#ifdef NGTCP2_SETTINGS_V2x
-  s->pmtud_probes = mtu_probes;
-  s->pmtud_probeslen = CURL_ARRAYSIZE(mtu_probes);
-  s->max_tx_udp_payload_size = 64 * 1024; /* mtu_probes[0]; */
+#ifdef NGTCP2_SETTINGS_V3
+  /* try ten times the ngtcp2 defaults here for problems with Caddy */
+  s->glitch_ratelim_burst = 1000 * 10;
+  s->glitch_ratelim_rate = 33 * 10;
 #endif
-
   t->initial_max_data = 10 * ctx->max_stream_window;
   t->initial_max_stream_data_bidi_local = ctx->max_stream_window;
   t->initial_max_stream_data_bidi_remote = ctx->max_stream_window;
diff --git a/tests/http/test_08_caddy.py b/tests/http/test_08_caddy.py
index 3073607e04..319ffeb962 100644
--- a/tests/http/test_08_caddy.py
+++ b/tests/http/test_08_caddy.py
@@ -108,7 +108,6 @@ class TestCaddy:
 
     # download 5MB files sequentially
     @pytest.mark.skipif(condition=Env().slow_network, reason="not suitable for slow network tests")
-    @pytest.mark.skipif(condition=Env().ci_run, reason="not suitable for CI runs")
     @pytest.mark.parametrize("proto", ['h2', 'h3'])
     def test_08_04a_download_10mb_sequential(self, env: Env, caddy: Caddy, proto):
         if proto == 'h3' and not env.have_h3_curl():
@@ -121,7 +120,6 @@ class TestCaddy:
 
     # download 10MB files sequentially
     @pytest.mark.skipif(condition=Env().slow_network, reason="not suitable for slow network tests")
-    @pytest.mark.skipif(condition=Env().ci_run, reason="not suitable for CI runs")
     @pytest.mark.parametrize("proto", ['h2', 'h3'])
     def test_08_04b_download_10mb_sequential(self, env: Env, caddy: Caddy, proto):
         if proto == 'h3' and not env.have_h3_curl():
@@ -135,7 +133,6 @@ class TestCaddy:
     # download 10MB files parallel
     @pytest.mark.skipif(condition=Env().slow_network, reason="not suitable for slow network tests")
     @pytest.mark.parametrize("proto", ['http/1.1', 'h2', 'h3'])
-    @pytest.mark.skipif(condition=Env().ci_run, reason="not suitable for CI runs")
     def test_08_05_download_1mb_parallel(self, env: Env, caddy: Caddy, proto):
         if proto == 'h3' and not env.have_h3_curl():
             pytest.skip("h3 not supported in curl")