diff --git a/go.mod b/go.mod
index 139157cd3..c867df5f5 100644
--- a/go.mod
+++ b/go.mod
@@ -8,7 +8,6 @@ require (
 	golang.org/x/net v0.0.0-20190620200207-3b0461eec859
 	golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd // indirect
 	golang.org/x/text v0.3.2 // indirect
-	google.golang.org/appengine v1.4.0 // indirect
 	google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb // indirect
 	google.golang.org/grpc v1.20.1
 )
diff --git a/go.sum b/go.sum
index ed2a1d844..01c02972c 100644
--- a/go.sum
+++ b/go.sum
@@ -67,6 +67,7 @@ google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZi
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1 h1:Hz2g2wirWK7H0qIIhGIqRGTuMwTE8HEKFnDZZ7lm9NU=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/plugin/ochttp/trace.go b/plugin/ochttp/trace.go
index 53e71305a..ed3a5db56 100644
--- a/plugin/ochttp/trace.go
+++ b/plugin/ochttp/trace.go
@@ -204,7 +204,10 @@ func TraceStatus(httpStatusCode int, statusLine string) trace.Status {
 		code = trace.StatusCodeUnavailable
 	case http.StatusOK:
 		code = trace.StatusCodeOK
+	case http.StatusConflict:
+		code = trace.StatusCodeAlreadyExists
 	}
+
 	return trace.Status{Code: code, Message: codeToStr[code]}
 }
 
diff --git a/plugin/ochttp/trace_test.go b/plugin/ochttp/trace_test.go
index 759103781..615c271eb 100644
--- a/plugin/ochttp/trace_test.go
+++ b/plugin/ochttp/trace_test.go
@@ -677,6 +677,10 @@ func TestStatusUnitTest(t *testing.T) {
 		{403, trace.Status{Code: trace.StatusCodePermissionDenied, Message: `PERMISSION_DENIED`}},
 		{301, trace.Status{Code: trace.StatusCodeOK, Message: `OK`}},
 		{501, trace.Status{Code: trace.StatusCodeUnimplemented, Message: `UNIMPLEMENTED`}},
+		{409, trace.Status{Code: trace.StatusCodeAlreadyExists, Message: `ALREADY_EXISTS`}},
+		{429, trace.Status{Code: trace.StatusCodeResourceExhausted, Message: `RESOURCE_EXHAUSTED`}},
+		{503, trace.Status{Code: trace.StatusCodeUnavailable, Message: `UNAVAILABLE`}},
+		{504, trace.Status{Code: trace.StatusCodeDeadlineExceeded, Message: `DEADLINE_EXCEEDED`}},
 	}
 
 	for _, tt := range tests {