src/sage/doctest/forker.py: Do not mask ImportError while calling JobClient

Author: Matthias Koeppe

src/sage/doctest/forker.py

@@ -1806,12 +1806,13 @@ def parallel_dispatch(self):
         job_client = None
         try:
             from gnumake_tokenpool import JobClient, NoJobServer
+        except ImportError:
+            pass
+        else:
             try:
                 job_client = JobClient(use_cysignals=True)
             except NoJobServer:
                 pass
-        except ImportError:
-            pass
 
         source_iter = iter(self.controller.sources)