metadata test does not work

[maribethb]

Describe the bug

metadata test says

== metadata
Zipping the compressed files
Size of dist/blockly_compressed.js at 928193 compared to previous undefined
Size of dist/blocks_compressed.js at 109229 compared to previous undefined
Size of dist/blockly_compressed.js.gz at 182818 compared to previous undefined
Size of dist/blocks_compressed.js.gz at 18234 compared to previous undefined
SUCCESS: metadata

To Reproduce

run npm run test

Expected behavior

previous values are not undefined

Screenshots

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Stack Traces

Replace with error stack trace.

Additional context

This has been happening for a while and was not caused (or fixed) by #6763