address coments

Author: jpbempel

dd-trace-core/src/test/java/datadog/trace/core/propagation/HaystackHttpInjectorTest.java

@@ -12,6 +12,7 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
 
 import datadog.context.propagation.CarrierSetter;
 import datadog.trace.api.DDSpanId;
@@ -81,6 +82,9 @@ void injectHttpHeaders(String traceId, String spanId, String traceUuid, String s
     verify(carrier).put(OT_BAGGAGE_PREFIX + "k2", "v2");
     verify(carrier).put("SOME_CUSTOM_HEADER", "some-value");
     verify(carrier).put(DD_PARENT_ID_BAGGAGE_KEY, "0");
+    verifyNoMoreInteractions(carrier);
+
+    tracer.close();
   }
 
   @TableTest({
@@ -130,5 +134,8 @@ void injectHttpHeadersWithHaystackTraceIdInBaggage(
     verify(carrier).put(DD_SPAN_ID_BAGGAGE_KEY, spanId);
     verify(carrier).put(OT_BAGGAGE_PREFIX + "k1", "v1");
     verify(carrier).put(OT_BAGGAGE_PREFIX + "k2", "v2");
+    verifyNoMoreInteractions(carrier);
+
+    tracer.close();
   }
 }