snapshottesting | Snapshot Testing for QML | Testing library

I'm having issues running xcTests after importing the SnapshotTesting framework available from -> https://github.com/pointfreeco/swift-snapshot-testing#installation

The build succeeds but the test fails

I always get a "Symbol not found: " saying it expected to find it in ....Frameworks/libswiftCore.dylib

e.g.

2018-12-11 17:39:48.799290+1100 Life[38438:3178136] Failed to load test bundle from file:///Users/garrypugh/Library/Developer/Xcode/DerivedData/Life-cowbtmytjcqvmqgvgonauprqpbpa/Build/Products/Debug-iphonesimulator/Life.app/PlugIns/LifeTests.xctest/: Error Domain=NSCocoaErrorDomain Code=3588 "dlopen(/Users/garrypugh/Library/Developer/Xcode/DerivedData/Life-cowbtmytjcqvmqgvgonauprqpbpa/Build/Products/Debug-iphonesimulator/Life.app/PlugIns/LifeTests.xctest/LifeTests, 265): Symbol not found: _$SSS8UTF8ViewVs8SequencesWP Referenced from: /Users/garrypugh/Library/Developer/Xcode/DerivedData/Life-cowbtmytjcqvmqgvgonauprqpbpa/Build/Products/Debug-iphonesimulator/Life.app/PlugIns/LifeTests.xctest/Frameworks/SnapshotTesting.framework/SnapshotTesting Expected in: /Users/garrypugh/Library/Developer/CoreSimulator/Devices/BA4AAED2-B310-4590-BCEB-AF28312A0B35/data/Containers/Bundle/Application/A7A23001-D0C6-47C9-ADED-F31A1136A0BB/Life.app/Frameworks/libswiftCore.dylib

I have followed the Carthage Instructions here ->

https://github.com/Carthage/Carthage#if-youre-building-for-ios-tvos-or-watchos

and here ->

https://github.com/Carthage/Carthage#adding-frameworks-to-unit-tests-or-a-framework

And have successfully (seemingly) downloaded and built the frameworks

1. Set up Cartfile

2. Run carthage update - which built the 3 frameworks (Mac, iOS, tvOS) i.e. SnapshotTesting.framework and their related SnapshotTesting.framework .dSYM files

Then when attempting to include this in the Testing Target of my iOS App I followed the following steps

1. Dragged the iOS SnapshotTesting.framework file to the Build Phases - Link Binary with Libraries Section

2. Added a /usr/local/bin/carthage copy-frameworks with

   Input Files $(SRCROOT)/Carthage/Build/iOS/SnapshotTesting.framework

   Output Files $(BUILT_PRODUCTS_DIR)/$(FRAMEWORKS_FOLDER_PATH)/SnapshotTesting.framework

3. I have ensured that my Runpath Search Paths (within Build Settings tab) has -> @loader_path/Frameworks

I am running Xcode 10.1

I'm not sure if this is a Issue with

1. Carthage setup

2. The SnapshotTesting framework

3. My build settings in Xcode

4. Or a restriction with dynamic verses static frameworks?

I have tried a few variations on locations of the Input / Output files, running the the Runscript before and after the Link Binary Section

Does anyone recognise this issue, Is there some other build settings that need to change enable this to work.