diff --git a/.travis.yml b/.travis.yml
index 6c0587c4..dbb65671 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,12 +5,13 @@ before_install:
     - "export DISPLAY=:99"
     - "sh -e /etc/init.d/xvfb start"
 install:
-    - "pip install -e git://github.com/edx/xblock-sdk.git#egg=xblock-sdk"
+    - "pip install -e git://github.com/edx/xblock-sdk.git@22c1b2f173919bef22f2d9d9295ec5396d02dffd#egg=xblock-sdk"
     - "pip install -r requirements.txt"
-    - "pip install -r $VIRTUAL_ENV/src/xblock-sdk/requirements.txt"
-    - "pip install -r $VIRTUAL_ENV/src/xblock-sdk/test-requirements.txt"
+    - "pip install -r $VIRTUAL_ENV/src/xblock-sdk/requirements/base.txt"
+    - "pip install -r $VIRTUAL_ENV/src/xblock-sdk/requirements/test.txt"
     - "pip uninstall -y xblock-problem-builder && python setup.py sdist && pip install dist/xblock-problem-builder-2.0.tar.gz"
     - "pip install -r test_requirements.txt"
+    - "mkdir var"
 script:
     - pep8 problem_builder --max-line-length=120
     - pylint problem_builder --disable=all --enable=function-redefined,undefined-variable,unused-variable
diff --git a/problem_builder/mentoring.py b/problem_builder/mentoring.py
index d61901c3..5c9e8d1f 100644
--- a/problem_builder/mentoring.py
+++ b/problem_builder/mentoring.py
@@ -221,6 +221,10 @@ def score(self):
 
         return Score(score, int(round(score * 100)), correct, incorrect, partially_correct)
 
+    def max_score(self):
+        """ Maximum score. We scale all scores to a maximum of 1.0 so this is always 1.0 """
+        return 1.0
+
     def include_theme_files(self, fragment):
         theme = self.get_theme()
         theme_package, theme_files = theme['package'], theme['locations']