diff --git a/mdk/config-dist.json b/mdk/config-dist.json
index 69f8d2fc..18249834 100644
--- a/mdk/config-dist.json
+++ b/mdk/config-dist.json
@@ -201,6 +201,8 @@
     "shifter": "/usr/bin/shifter",
     // Path to yuidoc
     "yuidoc": "/usr/local/bin/yuidoc",
+    // Path to ghostscript
+    "gs": "",
     // Path to your favourite editor. Set to null to guess it from the System environment.
     "editor": null,
 
diff --git a/mdk/config.py b/mdk/config.py
index 39afb953..be2e027d 100644
--- a/mdk/config.py
+++ b/mdk/config.py
@@ -26,6 +26,7 @@
 import json
 import re
 import copy
+from distutils.spawn import find_executable
 
 
 class ConfigObject(object):
@@ -56,6 +57,13 @@ def get(self, name=None, default=None):
                     break
         return data
 
+    def getExecutable(self, name=None, default=None):
+        path = self.get(name, default)
+        if path != None and path:
+            return path
+        path = find_executable(name)
+        return path
+
     def getFlat(self, data=None, parent=''):
         """Return the entire data as a flat array"""
         flatten = {}
@@ -170,6 +178,10 @@ def get(self, name=None):
         """Return a setting"""
         return self.data.get(name)
 
+    def getExecutable(self, name=None):
+        """Return a path to an executable"""
+        return self.data.getExecutable(name)
+
     def load(self, allowMissing=False):
         """Loads the configuration from the config files"""
 
diff --git a/mdk/moodle.py b/mdk/moodle.py
index 16fde31f..7b8a59cd 100644
--- a/mdk/moodle.py
+++ b/mdk/moodle.py
@@ -338,6 +338,9 @@ def initBehat(self, switchcompletely=False, force=False, prefix=None, faildumppa
             elif currentWwwroot != wwwroot:
                 logging.warning('Behat wwwroot not changed, already set to \'%s\', expected \'%s\'.' % (currentWwwroot, wwwroot))
 
+        # Set the pathtogs as this is required by some tests.
+        self.updateConfig('pathtogs', C.getExecutable('gs'))
+
         # Force a cache purge
         self.purge()