1 files changed, 5 insertions, 6 deletions
diff --git a/tests/docker/travis.py b/tests/docker/travis.py
index ea1ef169e6..e1433012bd 100755
--- a/tests/docker/travis.py
+++ b/tests/docker/travis.py
@@ -17,18 +17,17 @@ import yaml
 import itertools
 
 def load_yaml(fname):
-    return yaml.load(open(fname, "r").read())
+    return yaml.safe_load(open(fname, "r").read())
 
 def conf_iter(conf):
+    # If "compiler" is omitted from the included env then Travis picks the
+    # first entry of the global compiler list.
+    default_compiler = conf["compiler"][0]
     def env_to_list(env):
         return env if isinstance(env, list) else [env]
     for entry in conf["matrix"]["include"]:
         yield {"env": env_to_list(entry["env"]),
-               "compiler": entry["compiler"]}
-    for entry in itertools.product(conf["compiler"],
-                                   conf["env"]["matrix"]):
-        yield {"env": env_to_list(entry[1]),
-               "compiler": entry[0]}
+               "compiler": entry.get("compiler", default_compiler)}
 
 def main():
     if len(sys.argv) < 2: