diff --git a/README.rst b/README.rst
index 9b8864b..b583c1e 100644
--- a/README.rst
+++ b/README.rst
@@ -24,6 +24,11 @@ Documentation can be found in::
 
     ./Versag/SELMA.pdf
 
+You can build the report as follows::
+
+    $ cd Verslag
+    $ make
+
 Source can be found in::
 
     ./src/SELMA
diff --git a/test.py b/test.py
index 5382907..be711bc 100644
--- a/test.py
+++ b/test.py
@@ -125,8 +125,8 @@ def replacement(match):
             "Preserve line numbers from the original source file"
             return '\n' * match.group().count('\n')
 
-        open('temp.selma', 'w').write(
-            re.sub(sub_pattern, replacement, data, flags=re.DOTALL))
+        regex = re.compile(sub_pattern, re.DOTALL)
+        open('temp.selma', 'w').write(regex.sub(replacement, data))
 
         inputs = re.findall(input_pattern, data, re.DOTALL)
         outputs = re.findall(output_pattern, data, re.DOTALL)