Documentation: Add missing alternative for plugin in-tree testing

Bug: Issue 12096
Change-Id: I0370af4958bbe4cc52bc42b48f206d88beb8bdc8
diff --git a/src/main/resources/Documentation/build.md b/src/main/resources/Documentation/build.md
index 130cc2a..045e540 100644
--- a/src/main/resources/Documentation/build.md
+++ b/src/main/resources/Documentation/build.md
@@ -75,10 +75,11 @@
   ./tools/eclipse/project.py
 ```
 
-To execute the tests run:
+To execute the tests run either one of:
 
 ```
-  bazel test plugins/@PLUGIN@:events-log_tests
+  bazel test --test_tag_filters=@PLUGIN@ //...
+  bazel test plugins/@PLUGIN@:@PLUGIN@_tests
 ```
 
 More information about Buck can be found in the [Gerrit