Update README.md

README.md

@@ -58,6 +58,13 @@ make test
 >
 > for any question x, you can run `make qx` to see the output of this question, e.g. `make q1` or `make q4.2.1`
 
+If make is not installed, you can also run the command:
+```shell
+pytest
+```
+
+See the makefile in the project to specify the test you want to run.
+
 ## Q1. Occurrence frequency analysis [[toc](#table-of-content)]
 > :exclamation: **Important**
 >