Clean up formatting
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index a699399..50894d1 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -59,6 +59,7 @@
   def build_steps(self):
     return []
 
+
 class NodeLanguage(object):
 
   def __init__(self):
@@ -73,6 +74,7 @@
   def build_steps(self):
     return [['tools/run_tests/build_node.sh']]
 
+
 class PhpLanguage(object):
 
   def __init__(self):