test-dromaeo can't find osmesa

[jdm]

This made it work for me and xanework:

diff --git a/python/servo/testing_commands.py b/python/servo/testing_commands.py
index 8ed67964ba..b534289903 100644
--- a/python/servo/testing_commands.py
+++ b/python/servo/testing_commands.py
@@ -690,8 +690,12 @@ class MachCommands(CommandBase):
         # Check that a release servo build exists
         bin_path = path.abspath(self.get_binary_path(release, dev))
 
-        return check_call(
-            [run_file, "|".join(tests), bin_path, base_dir])
+        self.set_software_rendering_env(release)
+
+        run_globals = {"__file__": run_file}
+        execfile(run_file, run_globals)
+        return run_globals["start"]("|".join(tests), bin_path, base_dir)
+
 
     def set_software_rendering_env(self, use_release):
         # On Linux and mac, find the OSMesa software rendering library and
diff --git a/tests/dromaeo/run_dromaeo.py b/tests/dromaeo/run_dromaeo.py
index 8f7127f8c7..506c053517 100755
--- a/tests/dromaeo/run_dromaeo.py
+++ b/tests/dromaeo/run_dromaeo.py
@@ -44,11 +44,7 @@ class RequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
         return
 
 
-if __name__ == '__main__':
-    if len(sys.argv) == 4:
-        tests = sys.argv[1]
-        servo_exe = sys.argv[2]
-        base_dir = sys.argv[3]
+def start(tests, servo_exe, base_dir):
         os.chdir(base_dir)
 
         # Ensure servo binary can be found
@@ -75,5 +71,13 @@ if __name__ == '__main__':
         for test in data:
             print(" {0}{1} | {2}".format(test, " " * (l - len(test)), data[test]))
         proc.kill()
+
+
+if __name__ == '__main__':
+    if len(sys.argv) == 4:
+        tests = sys.argv[1]
+        servo_exe = sys.argv[2]
+        base_dir = sys.argv[3]
+        start(tests, servo_exe, base_dir)
     else:
         print_usage() 

[jdm]

This is probably also true for test-jquery.

[SimonSapin]

OSMesa is no longer used since #25853, is this still relevant?