diff --git a/coap/coap-request.js b/coap/coap-request.js
index 6147d35..1f8dd3d 100644
--- a/coap/coap-request.js
+++ b/coap/coap-request.js
@@ -63,7 +63,7 @@ module.exports = function (RED) {
             };
             reqOpts.method = config.method.toUpperCase() || "GET";
             if (config.method === "use" && msg.method != null) {
-                reqOpts = msg.method.toUpperCase();
+                reqOpts.method = msg.method.toUpperCase();
             }
 
             reqOpts.headers = msg.headers;
@@ -98,7 +98,7 @@ module.exports = function (RED) {
                         _send(data);
                     } else if (contentFormat === "text/plain" || configContentFormat === "text/plain") {
                         _send(data.toString());
-                    } else if (contentFormat.startsWith("application/") && contentFormat.endsWith("json")) {
+                    } else if (contentFormat.startsWith("application/") && contentFormat.includes("json")) {
                         try {
                             _send(JSON.parse(data.toString()));
                         } catch (error) {
@@ -109,7 +109,7 @@ module.exports = function (RED) {
                             });
                             node.error(error.message);
                         }
-                    } else if (contentFormat.startsWith("application/") && contentFormat.endsWith("cbor")) {
+                    } else if (contentFormat.startsWith("application/") && contentFormat.includes("cbor")) {
                         cbor.decodeAll(data, function (error, data) {
                             if (error) {
                                 node.error(error.message);
@@ -144,7 +144,7 @@ module.exports = function (RED) {
             var payload;
 
             if (reqOpts.method !== "GET") {
-                payload = _constructPayload(msg, config["content-format"]);
+                payload = _constructPayload(msg, reqOpts.headers["Content-Format"]);
             } else if (paytoqs === "query") {
                 try {
                     _appendQueryParams(reqOpts, msg.payload);
diff --git a/test/coap-request_spec.js b/test/coap-request_spec.js
index 58ba0fb..00cfc55 100644
--- a/test/coap-request_spec.js
+++ b/test/coap-request_spec.js
@@ -141,7 +141,7 @@ describe("CoapRequestNode", function () {
                     id: "n3",
                     type: "coap request",
                     "content-format": "text/plain",
-                    method: "",
+                    method: "use",
                     name: "coapRequest",
                     observe: false,
                     url: "coap://localhost:" + port + "/test-resource",
@@ -619,8 +619,18 @@ describe("CoapRequestNode", function () {
                                 id: "n1",
                                 type: "inject",
                                 name: "Fire once",
-                                payload: test.message,
-                                payloadType: "string",
+                                props: [
+                                    {
+                                        "p": "payload",
+                                        "vt": "string",
+                                        "v": test.message
+                                    },
+                                    {
+                                        "p": "headers",
+                                        "v": {"Content-Format": test.format},
+                                        "vt": "object"
+                                    }
+                                ],
                                 repeat: "",
                                 crontab: "",
                                 once: true,
@@ -629,7 +639,6 @@ describe("CoapRequestNode", function () {
                             {
                                 id: "n2",
                                 type: "coap request",
-                                "content-format": test.format,
                                 method: "POST",
                                 name: "coapRequestPost",
                                 observe: false,