diff --git a/stub-json/about/tests.sh b/stub-json/about/tests.sh
index c61481c..d25f3ad 100755
--- a/stub-json/about/tests.sh
+++ b/stub-json/about/tests.sh
@@ -1,11 +1,11 @@
 #!/bin/bash
 
 source ../support/nginx/reload.sh
+source ../support/trim.sh
 
 function test_json_header {
     nginx_reload_configuration
-    type=$(curl --head http://localhost:8080/json | grep "Content-Type:")
-    trimmed=$(echo "$type" | sed 's/\r//g' | xargs echo -n)
+    type=$(curl --head http://localhost:8080/json | grep "Content-Type:" | trim)
     
-    assertequals "$trimmed" "Content-Type: application/json"
+    assertequals "$type" "Content-Type: application/json"
 }
diff --git a/support/trim.sh b/support/trim.sh
new file mode 100755
index 0000000..6957baf
--- /dev/null
+++ b/support/trim.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+function trim {
+    sed 's/\r//g' | xargs echo -n
+}
\ No newline at end of file