Parse [tox:testenv] sections in setup.cfg (#1724)

1 files changed, 12 insertions, 6 deletions

diff --git a/src/tox/config/__init__.py b/src/tox/config/__init__.py
index 6e80d406..03f11d8b 100644
--- a/src/tox/config/__init__.py
+++ b/src/tox/config/__init__.py
@@ -1246,15 +1246,16 @@ class ParseIni(object):
         results = {}
         cur_self = self
 
-        def run(name, section, subs, config):
+        def run(name, section, subs, config, prefix):
             try:
-                results[name] = cur_self.make_envconfig(name, section, subs, config)
+                results[name] = cur_self.make_envconfig(name, section, subs, config, prefix=prefix)
             except Exception as exception:
                 failures[name] = (exception, traceback.format_exc())
 
         order = []
+        prefix = "tox:" if ini_path.basename == "setup.cfg" else ""
         for name in all_envs:
-            section = "{}{}".format(testenvprefix, name)
+            section = "{}{}".format(prefix + testenvprefix, name)
             factors = set(name.split("-"))
             if (
                 section in self._cfg
@@ -1264,7 +1265,7 @@ class ParseIni(object):
                 )
             ):
                 order.append(name)
-                thread = Thread(target=run, args=(name, section, reader._subs, config))
+                thread = Thread(target=run, args=(name, section, reader._subs, config, prefix))
                 thread.daemon = True
                 thread.start()
                 to_do.append(thread)
@@ -1377,9 +1378,14 @@ class ParseIni(object):
                 factors.update(*mapcat(_split_factor_expr_all, exprs))
         return factors
 
-    def make_envconfig(self, name, section, subs, config, replace=True):
+    def make_envconfig(self, name, section, subs, config, replace=True, prefix=""):
         factors = set(name.split("-"))
-        reader = SectionReader(section, self._cfg, fallbacksections=["testenv"], factors=factors)
+        reader = SectionReader(
+            section,
+            self._cfg,
+            fallbacksections=[prefix + "testenv"],
+            factors=factors,
+        )
         tc = TestenvConfig(name, config, factors, reader)
         reader.addsubstitutions(
             envname=name,