Run the following command in the same directory as your project to run tests in parallel from the command line:
xcodebuild test -scheme "YourSchemeName" -destination 'platform=iOS Simulator,OS=11.2,name=iPhone 8' -destination 'platform=iOS Simulator,OS=11.2,name=iPhone 6s' -configuration "Debug" ENABLE_TESTABILITY=YES SWIFT_VERSION=4.0 ONLY_ACTIVE_ARCH=YES
-destination 'platform=iOS Simulator,OS=11.2,name=iPhone 8'
, .
:
instruments -s devices
, , .