diff --git a/pipeline_api/pipeline_api.go b/pipeline_api/pipeline_api.go
index 77307d7..efe59dd 100644
--- a/pipeline_api/pipeline_api.go
+++ b/pipeline_api/pipeline_api.go
@@ -57,14 +57,15 @@ func (s *ApiServer) GetRunner(
 	}
 
 	var runnerTagsStr strings.Builder
-	fmt.Fprintf(&runnerTagsStr, "%v", req.Msg.Tags[0])
+	fmt.Fprintf(&runnerTagsStr, "[%v", req.Msg.Tags[0])
 	for _, tag := range req.Msg.Tags[1:] {
-		fmt.Fprintf(&runnerTagsStr, " %v", tag)
+		fmt.Fprintf(&runnerTagsStr, ", %v", tag)
 	}
+	fmt.Fprintf(&runnerTagsStr, "]")
 
 	response := <-respChan
 	if response.Err != nil {
-		log.Errorf("Could not get runner with tags \"%v\": %v", runnerTagsStr, response.Err)
+		log.Errorf("Could not get runner with tags \"%v\": %v", runnerTagsStr.String(), response.Err)
 		return nil, connect.NewError(connect.CodeNotFound, fmt.Errorf("Could not get runner"))
 	}