diff --git a/envs/monkey_zoo/blackbox/README.md b/envs/monkey_zoo/blackbox/README.md
index 808a0a5cb..f372244ce 100644
--- a/envs/monkey_zoo/blackbox/README.md
+++ b/envs/monkey_zoo/blackbox/README.md
@@ -1,20 +1,22 @@
 # Automatic blackbox tests
 ### Prerequisites
 1. Download google sdk: https://cloud.google.com/sdk/docs/
-2. Download service account key for MonkeyZoo project (if you deployed MonkeyZoo via terraform scripts then you already have it). 
+2. Download service account key for MonkeyZoo project (if you deployed MonkeyZoo via terraform scripts then you already have it).
 GCP console -> IAM -> service accounts(you can use the same key used to authenticate terraform scripts).
 Place the key in `envs/monkey_zoo/gcp_keys/gcp_key.json`.
-3. Deploy the relevant branch + complied executables to the Island machine on GCP.   
+3. Deploy the relevant branch + complied executables to the Island machine on GCP.
 
 ### Running the tests
-In order to execute the entire test suite, you must know the external IP of the Island machine on GCP. You can find 
-this information in the GCP Console `Compute Engine/VM Instances` under _External IP_. 
+In order to execute the entire test suite, you must know the external IP of the Island machine on GCP. You can find
+this information in the GCP Console `Compute Engine/VM Instances` under _External IP_.
 
 #### Running in command line
+Either run pytest from `/monkey` directory or set `PYTHONPATH` environment variable to
+`/monkey` directory so that blackbox tests could import other monkey code.
 Blackbox tests have following parameters:
 - `--island=IP` Sets island's IP
 - `--no-gcp` (Optional) Use for no interaction with the cloud (local test).
-- `--quick-performance-tests` (Optional) If enabled performance tests won't reset island and won't send telemetries, 
+- `--quick-performance-tests` (Optional) If enabled performance tests won't reset island and won't send telemetries,
 instead will just test performance of endpoints in already present island state.
 
 Example run command:
@@ -27,22 +29,22 @@ directory `monkey\envs\monkey_zoo\blackbox`.
 
 ### Running telemetry performance test
 
-**Before running performance test make sure browser is not sending requests to island!** 
+**Before running performance test make sure browser is not sending requests to island!**
 
 To run telemetry performance test follow these steps:
 0. Set `server_config.json` to "standard" (no password protection) setting.
 1. Gather monkey telemetries.
-    1. Enable "Export monkey telemetries" in Configuration -> Internal -> Tests if you don't have 
+    1. Enable "Export monkey telemetries" in Configuration -> Internal -> Tests if you don't have
     exported telemetries already.
     2. Run monkey and wait until infection is done.
     3. All telemetries are gathered in `monkey/telem_sample`
 2. Run telemetry performance test.
     1. Move directory `monkey/test_telems` to `envs/monkey_zoo/blackbox/tests/performance/test_telems`
-    2. (Optional) Use `envs/monkey_zoo/blackbox/tests/performance/utils/telem_parser.py` to multiply 
+    2. (Optional) Use `envs/monkey_zoo/blackbox/tests/performance/utils/telem_parser.py` to multiply
     telemetries gathered.
         1. Run `telem_parser.py` script with working directory set to `monkey\envs\monkey_zoo\blackbox`
         2. Pass integer to indicate the multiplier. For example running `telem_parser.py 4` will replicate
         telemetries 4 times.
         3. If you're using pycharm check "Emulate terminal in output console" on debug/run configuraion.
-    3. Performance test will run as part of BlackBox tests or you can run it separately by adding 
+    3. Performance test will run as part of BlackBox tests or you can run it separately by adding
     `-k 'test_telem_performance'` option.