diff --git a/assign1a.md b/assign1a.md
index 6808560f007c01668ff407f72920b5c2e83b8c45..31eff8161db988d1508317ad41ac3e0009d61670 100644
--- a/assign1a.md
+++ b/assign1a.md
@@ -43,7 +43,7 @@ You don't have to use the "hints" if you don't want to; there might
 be simpler ways to solve the questions.
 
 ### Testing using SQLTesting.py
-Build and run a container as before:
+Build and run a container as before (`docker build --rm -t 424 .`):
 - bash: `docker run -it -v $(pwd):/424 424`
 - tcsh: ``docker run -it -v `pwd`:/424 424``.
 - PowerShell: `docker run -it -v "${PWD}:/424" 424`. You might have to install WSL 2, and for