Backport PR #16126 on branch v3.1.x (TST: test_fork: Missing j… (#16131)

Kojoley · anntzer · web-flow · commit 00633aefaf62 · 2020-01-07T16:19:54.000+03:00
Backport PR #16126 on branch v3.1.x (TST: test_fork: Missing join) Co-authored-by: Antony Lee <anntzer.lee@gmail.com>
diff --git a/lib/matplotlib/tests/test_font_manager.py b/lib/matplotlib/tests/test_font_manager.py
@@ -198,4 +198,5 @@ def _model_handler(_):
 def test_fork():
     _model_handler(0)  # Make sure the font cache is filled.
     ctx = multiprocessing.get_context("fork")
-    ctx.Pool(processes=2).map(_model_handler, range(2))
+    with ctx.Pool(processes=2) as pool:
+        pool.map(_model_handler, range(2))
