diff --git a/internal/experiment/dnscheck/dnscheck.go b/internal/experiment/dnscheck/dnscheck.go
index 815ab2511..5bdb37fbf 100644
--- a/internal/experiment/dnscheck/dnscheck.go
+++ b/internal/experiment/dnscheck/dnscheck.go
@@ -166,7 +166,7 @@ func (m *Measurer) Run(ctx context.Context, args *model.ExperimentArgs) error {
 		return fmt.Errorf("%w: %s", ErrInvalidURL, err.Error())
 	}
 	switch URL.Scheme {
-	case "https", "dot", "udp", "tcp":
+	case "https", "dot", "udp", "tcp", "system":
 		// all good
 	default:
 		return ErrUnsupportedURLScheme
diff --git a/internal/experiment/dnscheck/richerinput.go b/internal/experiment/dnscheck/richerinput.go
index 56d17e3cc..69523361b 100644
--- a/internal/experiment/dnscheck/richerinput.go
+++ b/internal/experiment/dnscheck/richerinput.go
@@ -194,6 +194,27 @@ var defaultInput = []model.ExperimentTarget{
 		URL:    "https://dns.switch.ch/dns-query",
 		Config: &Config{},
 	},
+	&Target{
+		URL:    "https://root-key-sentinel-is-ta-38696.d2a8n3.rootcanary.net",
+		Config: &Config{},
+	},
+	&Target{
+		URL:    "https://root-key-sentinel-not-ta-38696.d2a8n3.rootcanary.net",
+		Config: &Config{},
+	},
+	&Target{
+		URL:    "https://root-key-sentinel-not-ta-20326.d2a8n3.rootcanary.net",
+		Config: &Config{},
+	},
+
+	&Target{
+		URL:    "https://root-key-sentinel-is-ta-20326.d2a8n3.rootcanary.net",
+		Config: &Config{},
+	},
+	&Target{
+		URL:    "https://bogus.d2a8n1.rootcanary.net",
+		Config: &Config{},
+	},
 }
 
 // extendedInput is an extended input target list for dnscheck.
diff --git a/internal/experiment/dnscheck/richerinput_test.go b/internal/experiment/dnscheck/richerinput_test.go
index 46f361cf9..01320d0cc 100644
--- a/internal/experiment/dnscheck/richerinput_test.go
+++ b/internal/experiment/dnscheck/richerinput_test.go
@@ -103,6 +103,83 @@ var testDefaultInput = []model.ExperimentTarget{
 			DefaultAddrs: "8.8.8.8 8.8.4.4",
 		},
 	},
+	&Target{
+		URL: "https://cloudflare-dns.com/dns-query",
+		Config: &Config{
+			HTTP3Enabled: true,
+			DefaultAddrs: "1.1.1.1 1.0.0.1",
+		},
+	},
+	&Target{
+		URL: "https://cloudflare-dns.com/dns-query",
+		Config: &Config{
+			DefaultAddrs: "1.1.1.1 1.0.0.1",
+		},
+	},
+	&Target{
+		URL: "https://dns.quad9.net/dns-query",
+		Config: &Config{
+			HTTP3Enabled: true,
+			DefaultAddrs: "9.9.9.9",
+		},
+	},
+	&Target{
+		URL: "https://dns.quad9.net/dns-query",
+		Config: &Config{
+			DefaultAddrs: "9.9.9.9",
+		},
+	},
+	&Target{
+		URL: "https://dns.adguard.com/dns-query",
+		Config: &Config{
+			HTTP3Enabled: true,
+		},
+	},
+	&Target{
+		URL:    "https://dns.adguard.com/dns-query",
+		Config: &Config{},
+	},
+	&Target{
+		URL: "https://dns.alidns.com/dns-query",
+		Config: &Config{
+			HTTP3Enabled: true,
+		},
+	},
+	&Target{
+		URL:    "https://dns.alidns.com/dns-query",
+		Config: &Config{},
+	},
+	&Target{
+		URL: "https://doh.opendns.com/dns-query",
+		Config: &Config{
+			HTTP3Enabled: true,
+		},
+	},
+	&Target{
+		URL:    "https://doh.opendns.com/dns-query",
+		Config: &Config{},
+	},
+	&Target{
+		URL: "https://dns.nextdns.io/dns-query",
+		Config: &Config{
+			HTTP3Enabled: true,
+		},
+	},
+	&Target{
+		URL:    "https://dns.nextdns.io/dns-query",
+		Config: &Config{},
+	},
+
+	&Target{
+		URL: "https://dns.switch.ch/dns-query",
+		Config: &Config{
+			HTTP3Enabled: true,
+		},
+	},
+	&Target{
+		URL:    "https://dns.switch.ch/dns-query",
+		Config: &Config{},
+	},
 }
 
 func TestTargetLoaderLoad(t *testing.T) {
@@ -269,7 +346,6 @@ func TestTargetLoaderLoad(t *testing.T) {
 			expectErr:     nil,
 			expectTargets: nil,
 		},
-
 		{
 			name:    "with no options, not inputs, no files",
 			options: &Config{},