Jest snapshots work locally but consistently fail on Travis CI

Question

My Jest snapshot tests consistently fail on Travis with the following difference:

-      "_instance": Constructor {
+      "_instance":  {

Dev dependencies include:

"babel-jest": "^19.0.0",
"jest": "^19.0.2",
"react-addons-test-utils": "^15.4.2",
"babel-preset-es2015": "^6.22.0",
"babel-preset-react": "^6.23.0",
"react-test-renderer": "^15.4.2",
"enzyme": "^2.7.1",
"enzyme-to-json": "^1.5.0",
"react": "^15.2.0",
"react-dom": "^15.2.1"

Using Node 7.0.0 locally and on Travis.

Any ideas?

Do you run it with the same command. We had this problem when we run it with code coverage on CI system. — Andreas Köberle, Mar 10 '17 at 08:15
@JaredSilver can you please comment on the approved answer? What did you end up doing? — mcabe, Aug 14 '18 at 11:04

score 7 · Accepted Answer · answered Mar 12 '17 at 15:14

I would make sure that I am using the exact same version on both locally and on CI. Try pinning jest and babel-jest to a specific version:

"babel-jest": "=19.0.0",
"jest": "=19.0.2",

Maybe I would do the same with all the dependencies! Then remove node_modules/ from your machine, run the tests (update snapshots if necessary) and push.

Ps. I would also try to empty the caches on travis: https://travis-ci.com/USERNAME/REPOSITORY_NAME/caches.

score 3 · Answer 2 · answered Jun 16 '21 at 21:38

3

In my case, I had a mismatch between the node version in the build system vs local.

answered Jun 16 '21 at 21:38

ChaitanyaBhatt

1,158
14
11

Jest snapshots work locally but consistently fail on Travis CI

2 Answers2