diff --git a/tests/test_server.rs b/tests/test_server.rs
index 4a4a1538c..e5631f398 100644
--- a/tests/test_server.rs
+++ b/tests/test_server.rs
@@ -139,7 +139,18 @@ fn test_headers() {
         |app| app.handler(|_| {
             let mut builder = httpcodes::HTTPOk.build();
             for idx in 0..90 {
-                builder.header(format!("X-TEST-{}", idx).as_str(), "TEST TEST TEST");
+                builder.header(
+                    format!("X-TEST-{}", idx).as_str(),
+                    "TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
+                     TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
+                     TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
+                     TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
+                     TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
+                     TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
+                     TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
+                     TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
+                     TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
+                     TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST ");
             }
             builder.body(STR)}));