My TickSpec.xunit boilerplate (just add .feature files as EmbeddedResources and group them into XXXFeatures.fs as in the example DiagnosticFeatures.fs file)

DiagnosticFeatures.fs

open TickSpec

open Features

module DiagnosticFeatures =

    [<TickFact>] 
    let ConnectivityFeature () =
        generateScenariosFromEmbeddedFeatureFile "Connectivity"

    [<TickFact>] 
    let VersionFeature () =
        generateScenariosFromEmbeddedFeatureFile "Version"

#if INCLUDE_INTERNAL
    [<TickFact>] 
    let IntegrityFeature () =
        generateScenariosFromEmbeddedFeatureFile "Integrity"
#endif

Features.fs

open TickSpec

module Features =
    let assembly = System.Reflection.Assembly.GetExecutingAssembly()
    let stepDefinitions = new StepDefinitions(assembly.GetExportedTypes())

    let generateScenariosFromEmbeddedFeatureFile embeddedDotFeatureFilename = 
        let source = embeddedDotFeatureFilename + ".feature"
        stepDefinitions.GenerateScenarios(source,assembly.GetManifestResourceStream(source))