XXX: revert _collect_seen_pkgdirs

2 files changed, 16 insertions, 4 deletions

diff --git a/src/_pytest/main.py b/src/_pytest/main.py
index 46228f824..a2b27d9fa 100644
--- a/src/_pytest/main.py
+++ b/src/_pytest/main.py
@@ -387,7 +387,6 @@ class Session(nodes.FSCollector):
         self._initialpaths = frozenset()
         # Keep track of any collected nodes in here, so we don't duplicate fixtures
         self._node_cache = {}
-        self._collect_seen_pkgdirs = set()
 
         self.config.pluginmanager.register(self, name="session")
 
@@ -505,7 +504,6 @@ class Session(nodes.FSCollector):
                 if parent.isdir():
                     pkginit = parent.join("__init__.py")
                     if pkginit.isfile():
-                        self._collect_seen_pkgdirs.add(parent)
                         if pkginit in self._node_cache:
                             root = self._node_cache[pkginit][0]
                         else:
@@ -531,12 +529,13 @@ class Session(nodes.FSCollector):
                 def filter_(f):
                     return f.check(file=1)
 
+            seen_dirs = set()
             for path in argpath.visit(
                 fil=filter_, rec=self._recurse, bf=True, sort=True
             ):
                 dirpath = path.dirpath()
-                if dirpath not in self._collect_seen_pkgdirs:
-                    self._collect_seen_pkgdirs.add(dirpath)
+                if dirpath not in seen_dirs:
+                    seen_dirs.add(dirpath)
                     pkginit = dirpath.join("__init__.py")
                     if pkginit.exists() and parts(pkginit.strpath).isdisjoint(paths):
                         for x in root._collectfile(pkginit):
diff --git a/testing/test_collection.py b/testing/test_collection.py
index dd8ecb1af..c7cde090e 100644
--- a/testing/test_collection.py
+++ b/testing/test_collection.py
@@ -978,6 +978,19 @@ def test_collect_init_tests(testdir):
             "<Package *",
             "  <Module '__init__.py'>",
             "    <Function 'test_init'>",
+            "<Module 'tests/test_foo.py'>",
+            "  <Function 'test_foo'>",
+        ]
+    )
+    # XXX: Same as before, but different order.
+    result = testdir.runpytest(".", "tests", "--collect-only")
+    result.stdout.fnmatch_lines(
+        [
+            "collected 2 items",
+            "<Package *",
+            "  <Module '__init__.py'>",
+            "    <Function 'test_init'>",
+            "<Package *",
             "  <Module 'test_foo.py'>",
             "    <Function 'test_foo'>",
         ]