@@ -0,0 +1,2 @@
+Changed the way of searching left bracket [ in case of subsets of tests.
+(thanks [ilexei](https://github.com/ilexei))
@@ -434,6 +434,32 @@ def _parse_node_id(
     )
 
 
+def _find_left_bracket(nodeid):
+    """Return tuple of part before final bracket open, separator [, and the remainder.
+    Notes:
+        Testcase names in case of parametrized tests are wrapped in [<test-case-name>].
+    Examples:
+        dirname[sometext]/dirname/testfile.py::testset::testname[testcase]
+        => ('dirname[sometext]/dirname/testfile.py::testset::testname', '[', 'testcase]')
+        dirname/dirname/testfile.py::testset::testname[testcase]
+        => ('dirname/dirname/testfile.py::testset::testname', '[', 'testcase]')
+        dirname/dirname/testfile.py::testset::testname[testcase[x]]
+        => ('dirname/dirname/testfile.py::testset::testname', '[', 'testcase[x]]')
+    """
+    if not nodeid.endswith("]"):
+        return nodeid, "", ""
+    bracketcount = 0
+    for index, char in enumerate(nodeid[::-1]):
+        if char == "]":
+            bracketcount += 1
+        elif char == "[":
+            bracketcount -= 1
+        if bracketcount == 0:
+            n = len(nodeid) - 1 - index
+            return nodeid[:n], nodeid[n], nodeid[n + 1 :]
+    return nodeid, "", ""
+
+
 def _iter_nodes(
     testid,
     kind,
@@ -448,7 +474,7 @@ def _iter_nodes(
         testid = "." + _pathsep + testid
 
     if kind == "function" and nodeid.endswith("]"):
-        funcid, sep, parameterized = nodeid.partition("[")
+        funcid, sep, parameterized = _find_left_bracket(nodeid)
         if not sep:
             raise should_never_reach_here(
                 nodeid,
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+Changed the way of searching left bracket [ in case of subsets of tests.`
	`2`	`+(thanks [ilexei](https://github.com/ilexei))`