diff --git a/ipam/http.go b/ipam/http.go
index ec5d2b45..416c1e86 100644
--- a/ipam/http.go
+++ b/ipam/http.go
@@ -204,6 +204,6 @@ func (alloc *Allocator) HandleHTTP(router *mux.Router, defaultSubnet address.CID
 		if alloc.tracker != nil {
 			tracker = alloc.tracker.String()
 		}
-		fmt.Fprintf(w, tracker)
+		fmt.Fprintln(w, tracker)
 	})
 }
diff --git a/test/images/network-tester/webserver.go b/test/images/network-tester/webserver.go
index 4315a2aa..ff1342b5 100644
--- a/test/images/network-tester/webserver.go
+++ b/test/images/network-tester/webserver.go
@@ -91,7 +91,7 @@ func (s *State) serveClientIP(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusInternalServerError)
 	}
 
-	fmt.Fprintf(w, host)
+	fmt.Fprintln(w, host)
 }
 
 // serveRead writes our json encoded state