diff --git a/package.json b/package.json
index d9e6fff..16bb874 100644
--- a/package.json
+++ b/package.json
@@ -49,6 +49,7 @@
     "mocha": "^7.0.1",
     "nyc": "^15.0.0",
     "rimraf": "^3.0.2",
+    "qs": "^6.5.1",
     "webpack": "^4.16.4",
     "webpack-cli": "^3.3.11"
   },
diff --git a/src/handle_request.js b/src/handle_request.js
index d16be1c..6234a99 100644
--- a/src/handle_request.js
+++ b/src/handle_request.js
@@ -50,7 +50,7 @@ function handleRequest(mockAdapter, resolve, reject, config) {
     config.method,
     url,
     config.data,
-    config.params,
+    typeof config.paramsSerializer === 'function' ? config.paramsSerializer(config.params) : config.params,
     config.headers,
     config.baseURL
   );
diff --git a/src/utils.js b/src/utils.js
index 91035fc..302acd7 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -77,6 +77,8 @@ function isBodyOrParametersMatching(method, body, parameters, required) {
   var allowedParamsMethods = ["delete", "get", "head", "options"];
   if (allowedParamsMethods.indexOf(method.toLowerCase()) >= 0) {
     var params = required ? required.params : undefined;
+    if (params && typeof required.paramsSerializer === "function")
+      params = required.paramsSerializer(params);
     return isObjectMatching(parameters, params);
   } else {
     return isBodyMatching(body, required);
@@ -88,7 +90,7 @@ function isObjectMatching(actual, expected) {
   if (typeof expected.asymmetricMatch === "function") {
     return expected.asymmetricMatch(actual);
   }
-  return isEqual(actual, expected);
+  return isEqual(parameters, required) || parameters === required;
 }
 
 function isBodyMatching(body, requiredBody) {
@@ -98,7 +100,7 @@ function isBodyMatching(body, requiredBody) {
   var parsedBody;
   try {
     parsedBody = JSON.parse(body);
-  } catch (e) { }
+  } catch (e) {}
 
   return isObjectMatching(parsedBody ? parsedBody : body, requiredBody);
 }
@@ -124,12 +126,12 @@ function settle(resolve, reject, response, delay) {
     response.config.validateStatus(response.status)
       ? resolve(response)
       : reject(
-        createAxiosError(
-          "Request failed with status code " + response.status,
-          response.config,
-          response
-        )
-      );
+          createAxiosError(
+            "Request failed with status code " + response.status,
+            response.config,
+            response
+          )
+        );
     return;
   }
 
@@ -170,14 +172,16 @@ function createAxiosError(message, config, response, code) {
       stack: this.stack,
       // Axios
       config: this.config,
-      code: this.code
+      code: this.code,
     };
   };
   return error;
 }
 
 function createCouldNotFindMockError(config) {
-  var message = "Could not find mock for: \n" + JSON.stringify(config, ['method', 'url'], 2);
+  var message =
+    "Could not find mock for: \n" +
+    JSON.stringify(config, ["method", "url"], 2);
   var error = new Error(message);
   error.isCouldNotFindMockError = true;
   error.url = config.url;
@@ -197,5 +201,5 @@ module.exports = {
   isBuffer: isBuffer,
   isEqual: isEqual,
   createAxiosError: createAxiosError,
-  createCouldNotFindMockError: createCouldNotFindMockError
+  createCouldNotFindMockError: createCouldNotFindMockError,
 };
diff --git a/test/basics.spec.js b/test/basics.spec.js
index ae2e899..63c3608 100644
--- a/test/basics.spec.js
+++ b/test/basics.spec.js
@@ -1,6 +1,7 @@
 var axios = require("axios");
 var fs = require("fs");
 var expect = require("chai").expect;
+var qs = require("qs");
 
 var MockAdapter = require("../src");
 
@@ -858,10 +859,44 @@ describe("MockAdapter basics", function () {
       })
       .catch(function (error) {
         var serializableError = error.toJSON();
-        expect(serializableError.message).to.equal("Request failed with status code 404");
+        expect(serializableError.message).to.equal(
+          "Request failed with status code 404"
+        );
         expect(serializableError.name).to.equal("Error");
         expect(serializableError.stack).to.exist;
         expect(serializableError.config).to.exist;
       });
   });
+
+  it("can pass serialized query params", function () {
+    var params = { user_id: [123, 456] };
+    var serializer = function (params) {
+      return qs.stringify(params, { arrayFormat: "repeat" });
+    };
+
+    expect(serializer(params)).to.equal("user_id=123&user_id=456");
+    mock
+      .onGet("/withSerializedParams", {
+        paramsSerializer: serializer,
+        params: params,
+      })
+      .reply(200);
+
+    return instance
+      .get("/withSerializedParams", {
+        paramsSerializer: serializer,
+        params: params,
+        in: true,
+      }) // with serialization
+      .then(function (response) {
+        expect(response.status).to.equal(200);
+        return instance.get("/withSerializedParams", {
+          params: params,
+          in: true,
+        }); // without serialization
+      })
+      .catch(function (error) {
+        expect(error.response.status).to.equal(404);
+      });
+  });
 });