diff --git a/config/endstat_conf.example.ron b/config/endstat_conf.example.ron
index c8e6210..42f8002 100644
--- a/config/endstat_conf.example.ron
+++ b/config/endstat_conf.example.ron
@@ -35,7 +35,8 @@
       endpoints:[
         (label: "The code doesn't match!", endpoint: "http://example.com/", code: 204),
         (label: "The body doesn't match!", endpoint: "http://example.com/", body: "asdf"),
-        (label: "Slow reponse time", endpoint: "http://slowwly.robertomurray.co.uk/delay/2000/url/"),
+        (label: "Slow reponse time", endpoint: "http://slowwly.robertomurray.co.uk/delay/2000/url/", max_rtt: 1337),
+        (label: "Plethora of issues!", endpoint: "http://slowwly.robertomurray.co.uk/delay/1000/url/", body: "asdf", code: 418, max_rtt: 50),
         (label: "Here's an error:", endpoint: "https://some-invalid-website.arpa")
       ]
     ),
diff --git a/src/config.rs b/src/config.rs
index b3c4df2..89621b8 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -9,6 +9,7 @@ pub struct EndpointConfig {
     pub body: Option<String>,
     pub body_hash: Option<String>,
     pub follow_redirects: Option<bool>,
+    pub max_rtt: Option<i64>,
     pub should_err: Option<bool>,
 }
 
diff --git a/src/updater.rs b/src/updater.rs
index f5524a5..659074d 100644
--- a/src/updater.rs
+++ b/src/updater.rs
@@ -68,7 +68,7 @@ fn get_result(
                 error = append_err_msg(
                     error,
                     format!(
-                        "Status code mismatch: {} != {}.",
+                        "Status code mismatch: {} != {}",
                         res.status().as_u16(),
                         code
                     ),
@@ -84,12 +84,17 @@ fn get_result(
             } else if !body.is_empty() && res_body != body {
                 error = append_err_msg(
                     error,
-                    format!("Body mismatch: {} != {}.", res_body.len(), body.len()),
+                    format!("Body mismatch: {} != {}", res_body.len(), body.len()),
                 );
             }
 
-            if rtt.num_seconds() >= 2 {
-                error = append_err_msg(error, format!("RTT too long: {}", rtt_string));
+            if let Some(max_rtt) = endpoint.max_rtt {
+                if rtt.num_milliseconds() > max_rtt {
+                    error = append_err_msg(
+                        error,
+                        format!("RTT too long: {} > {}s", rtt_string, max_rtt as f64 / 1000.),
+                    );
+                }
             }
 
             if error.is_some() {
@@ -122,7 +127,7 @@ fn get_url(base: &Option<String>, path: &String, port: Option<u16>) -> Result<St
 
 fn append_err_msg(optional: Option<String>, to_append: String) -> Option<String> {
     Some(match optional {
-        Some(e) => format!("{} {}", e, to_append),
+        Some(e) => format!("{}\n{}", e, to_append),
         None => to_append,
     })
 }