We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Add version string to st2tests to make it installable
Prior to this change, this will fail:

    cd st2tests/st2tests
    pip install .

After this change that command successfully installs the `st2tests` package. This will also work for installing via GitHub as in:

    pip install -e git+https://github.com/StackStorm/st2.git@v3.2.0#egg=st2tests&subdirectory=st2tests

The original request in #2574 is to get st2tests onto PyPI, and I'm not sure if this will accomplish that request, but this is a good first step.

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `st2tests/st2tests/__init__.py`
Content:
```
1 # Copyright 2020 The StackStorm Authors.
2 # Copyright 2019 Extreme Networks, Inc.
3 #
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at
7 #
8 #     http://www.apache.org/licenses/LICENSE-2.0
9 #
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
15 
16 from __future__ import absolute_import
17 
18 from st2tests.base import EventletTestCase
19 from st2tests.base import DbTestCase
20 from st2tests.base import ExecutionDbTestCase
21 from st2tests.base import DbModelTestCase
22 from st2tests.base import WorkflowTestCase
23 
24 
25 __all__ = [
26     'EventletTestCase',
27     'DbTestCase',
28     'ExecutionDbTestCase',
29     'DbModelTestCase',
30     'WorkflowTestCase'
31 ]
32
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/st2tests/st2tests/__init__.py b/st2tests/st2tests/__init__.py
--- a/st2tests/st2tests/__init__.py
+++ b/st2tests/st2tests/__init__.py
@@ -29,3 +29,5 @@
     'DbModelTestCase',
     'WorkflowTestCase'
 ]
+
+__version__ = '3.3dev'

{"golden_diff": "diff --git a/st2tests/st2tests/__init__.py b/st2tests/st2tests/__init__.py\n--- a/st2tests/st2tests/__init__.py\n+++ b/st2tests/st2tests/__init__.py\n@@ -29,3 +29,5 @@\n     'DbModelTestCase',\n     'WorkflowTestCase'\n ]\n+\n+__version__ = '3.3dev'\n", "issue": "Add version string to st2tests to make it installable\nPrior to this change, this will fail:\r\n\r\n    cd st2tests/st2tests\r\n    pip install .\r\n\r\nAfter this change that command successfully installs the `st2tests` package. This will also work for installing via GitHub as in:\r\n\r\n    pip install -e git+https://github.com/StackStorm/st2.git@v3.2.0#egg=st2tests&subdirectory=st2tests\r\n\r\nThe original request in #2574 is to get st2tests onto PyPI, and I'm not sure if this will accomplish that request, but this is a good first step.\n", "before_files": [{"content": "# Copyright 2020 The StackStorm Authors.\n# Copyright 2019 Extreme Networks, Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#     http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nfrom __future__ import absolute_import\n\nfrom st2tests.base import EventletTestCase\nfrom st2tests.base import DbTestCase\nfrom st2tests.base import ExecutionDbTestCase\nfrom st2tests.base import DbModelTestCase\nfrom st2tests.base import WorkflowTestCase\n\n\n__all__ = [\n    'EventletTestCase',\n    'DbTestCase',\n    'ExecutionDbTestCase',\n    'DbModelTestCase',\n    'WorkflowTestCase'\n]\n", "path": "st2tests/st2tests/__init__.py"}], "after_files": [{"content": "# Copyright 2020 The StackStorm Authors.\n# Copyright 2019 Extreme Networks, Inc.\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#     http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nfrom __future__ import absolute_import\n\nfrom st2tests.base import EventletTestCase\nfrom st2tests.base import DbTestCase\nfrom st2tests.base import ExecutionDbTestCase\nfrom st2tests.base import DbModelTestCase\nfrom st2tests.base import WorkflowTestCase\n\n\n__all__ = [\n    'EventletTestCase',\n    'DbTestCase',\n    'ExecutionDbTestCase',\n    'DbModelTestCase',\n    'WorkflowTestCase'\n]\n\n__version__ = '3.3dev'\n", "path": "st2tests/st2tests/__init__.py"}]}