Run tests with ip=*

make sure it's covered

Author: minrk

.github/workflows/test.yml

@@ -45,6 +45,7 @@ jobs:
             tornado: "5.1.1"
           - python: "3.6"
           - python: "3.7"
+            controller_ip: "*"
           - python: "3.8"
             mpi: true
           - python: "3.9"
@@ -59,6 +60,11 @@ jobs:
             ~/conda
           key: conda
 
+      - name: Set environment variables
+        if: matrix.controller_ip
+        run: |
+          echo "IPP_CONTROLLER_IP=${{ matrix.controller_ip }}" >> $GITHUB_ENV
+
       - name: Install Python (conda) ${{ matrix.python }}
         if: matrix.mpi
         run: |

ipyparallel/tests/__init__.py

@@ -68,6 +68,8 @@ def __str__(self):
         '--ping=250',
         '--dictdb',
     ]
+    if os.environ.get("IPP_CONTROLLER_IP"):
+        cp.cmd_and_args.append(f"--ip={os.environ['IPP_CONTROLLER_IP']}")
     cp.start()
     launchers.append(cp)
     tic = time.time()