Cleanup test side-effects

Author: mcculls

dd-trace-core/src/test/groovy/datadog/trace/core/propagation/XRayHttpInjectorTest.groovy

@@ -6,6 +6,7 @@ import datadog.trace.api.DDTraceId
 import datadog.trace.api.DynamicConfig
 import datadog.trace.api.time.TimeSource
 import datadog.trace.bootstrap.instrumentation.api.AgentTracer.NoopPathwayContext
+import datadog.trace.core.datastreams.DataStreamsMonitoring
 
 import static datadog.trace.api.sampling.PrioritySampling.*
 import static datadog.trace.api.sampling.SamplingMechanism.*
@@ -136,7 +137,11 @@ class XRayHttpInjectorTest extends DDCoreSpecification {
     setup:
     def writer = new ListWriter()
     def timeSource = Mock(TimeSource)
-    def tracer = tracerBuilder().writer(writer).timeSource(timeSource).build()
+    def tracer = tracerBuilder()
+      .dataStreamsMonitoring(Mock(DataStreamsMonitoring))
+      .writer(writer)
+      .timeSource(timeSource)
+      .build()
     final DDSpanContext mockedContext =
       new DDSpanContext(
       DDTraceId.from("1"),