terminal: include markers in `--collect-only` output

Closes #1509

AUTHORS

@@ -387,6 +387,7 @@ Terje Runde
 Thomas Grainger
 Thomas Hisch
 Tim Hoffmann
+Tim Sampson
 Tim Strazny
 TJ Bruno
 Tobias Diez

changelog/1509.improvement.rst

@@ -0,0 +1 @@
+A comma-separated list of markers for each test will be included in the output of `--collect-only` when called with `--verbosity=-1`.

src/_pytest/terminal.py

@@ -826,7 +826,13 @@ class TerminalReporter:
                     self._tw.line("%s: %d" % (name, count))
             else:
                 for item in items:
-                    self._tw.line(item.nodeid)
+                    marks = {
+                        m.name
+                        for m in item.iter_markers()
+                        if m.name not in ["usefixtures", "parametrize"]
+                    }
+                    marks_str = f" marks: {','.join(marks)}"
+                    self._tw.line(f"{item.nodeid}{marks_str}")
             return
         stack: List[Node] = []
         indent = ""

testing/test_cacheprovider.py

@@ -1154,9 +1154,9 @@ class TestNewFirst:
         result = pytester.runpytest("--nf", "--collect-only", "-q")
         result.stdout.fnmatch_lines(
             [
-                "test_1/test_1.py::test_2",
+                "test_1/test_1.py::test_2 marks: ",
-                "test_2/test_2.py::test_1",
+                "test_2/test_2.py::test_1 marks: ",
-                "test_1/test_1.py::test_1",
+                "test_1/test_1.py::test_1 marks: ",
             ]
         )
 
@@ -1173,9 +1173,9 @@ class TestNewFirst:
         result.stdout.fnmatch_lines(
             [
                 "new_items: *test_1.py*test_1.py*test_2.py*",
-                "test_1/test_1.py::test_2",
+                "test_1/test_1.py::test_2 marks: ",
-                "test_2/test_2.py::test_1",
+                "test_2/test_2.py::test_1 marks: ",
-                "test_1/test_1.py::test_1",
+                "test_1/test_1.py::test_1 marks: ",
             ]
         )