From 919384ca47d611bf9f94a986b09daf85ca5b7d09 Mon Sep 17 00:00:00 2001
From: Anthony Sottile <asottile@umich.edu>
Date: Mon, 7 Feb 2022 20:17:14 -0500
Subject: [PATCH] allow running testids which contain :: in the parametrized
 portion

---
 src/_pytest/main.py  | 5 ++++-
 testing/test_main.py | 6 ++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/_pytest/main.py b/src/_pytest/main.py
index afe613fd0d9..8f590754ae0 100644
--- a/src/_pytest/main.py
+++ b/src/_pytest/main.py
@@ -870,7 +870,10 @@ def resolve_collection_argument(
     If the path doesn't exist, raise UsageError.
     If the path is a directory and selection parts are present, raise UsageError.
     """
-    strpath, *parts = str(arg).split("::")
+    base, squacket, rest = str(arg).partition("[")
+    strpath, *parts = base.split("::")
+    if parts:
+        parts[-1] = f"{parts[-1]}{squacket}{rest}"
     if as_pypath:
         strpath = search_pypath(strpath)
     fspath = invocation_path / strpath
diff --git a/testing/test_main.py b/testing/test_main.py
index 6a13633f6a9..926715a8c47 100644
--- a/testing/test_main.py
+++ b/testing/test_main.py
@@ -171,6 +171,12 @@ def test_pypath(self, invocation_path: Path) -> None:
                 invocation_path, "pkg::foo::bar", as_pypath=True
             )
 
+    def test_parametrized_name_with_colons(self, invocation_path: Path) -> None:
+        ret = resolve_collection_argument(
+            invocation_path, "src/pkg/test.py::test[a::b]"
+        )
+        assert ret == (invocation_path / "src/pkg/test.py", ["test[a::b]"])
+
     def test_does_not_exist(self, invocation_path: Path) -> None:
         """Given a file/module that does not exist raises UsageError."""
         with pytest.raises(