diff --git a/Library/Homebrew/test/fixtures/test.diff b/Library/Homebrew/test/fixtures/test.diff
new file mode 100644
index 0000000000..7b57f8fc92
--- /dev/null
+++ b/Library/Homebrew/test/fixtures/test.diff
@@ -0,0 +1,10 @@
+diff --git a/libexec/NOOP b/libexec/NOOP
+index bfdda4c..e08d8f4 100755
+--- a/libexec/NOOP
++++ b/libexec/NOOP
+@@ -1,2 +1,2 @@
+ #!/bin/bash
+-echo NOOP
+\ No newline at end of file
++echo ABCD
+\ No newline at end of file