Update README.md

README.md

@@ -14,9 +14,23 @@ You can execute the tests with
 scala-cli test .
 ```
 
+or
+
+```sh
+scala test .
+```
+
+depending on how you have Scala(-CLI) instsalled
+
 To test only a single challenge, say Challenge1
 
 ```sh
 scala-cli test . --test-only '*.Challenge1Suite'
 ```
 
+or 
+
+```sh
+scala test . --test-only '*.Challenge1Suite'
+```
+