iOS UI Tests

Hi,
I’m getting the following error when trying to run UI Tests. Each test fails with this error: ‘UI Testing Failure - Failed to get refreshed snapshot’. Any ideas?

machine:
xcode:
version: "7.2"
checkout:
post:
- git submodule sync
- git submodule update --init
test:
override:
- xcodebuild -project Project.xcodeproj
-sdk iphonesimulator
-destination ‘platform=iOS Simulator,OS=9.2,name=iPhone 6s’
-scheme TestApplication
PLATFORM_NAME=iphonesimulator
clean build test | tee $CIRCLE_ARTIFACTS/xcode_raw.log |
xcpretty --color --report junit --output
post:

Thanks!