diff --git a/lib/mongodb.js b/lib/mongodb.js
index 7a19eb6c7..c0036cb77 100644
--- a/lib/mongodb.js
+++ b/lib/mongodb.js
@@ -333,8 +333,8 @@ MongoDB.prototype.connect = function(callback) {
     }
 
     // This is special processing if database is not part of url, but is in settings
-    if (self.settings.database && self.settings.url) {
-      if ((self.settings.url.indexOf('/' + self.settings.database) === -1) && (self.settings.url.indexOf('authSource=' + self.settings.database) === -1)) {
+    if (self.settings.url && self.settings.database) {
+      if (self.settings.url.indexOf('/' + self.settings.database) === -1) {
         self.settings.url = processMongoDBURL(self.settings.database, self.settings.url);
       }
     }
diff --git a/test/mongodb.test.js b/test/mongodb.test.js
index 1a5172627..2a89d1118 100644
--- a/test/mongodb.test.js
+++ b/test/mongodb.test.js
@@ -449,6 +449,81 @@ describe('mongodb connector', function() {
         });
       });
     });
+
+    it("should honor the settings database if url doesn't have db", function(done) {
+      const cfg = JSON.parse(JSON.stringify(global.config));
+      const testDb = cfg.database;
+      cfg.url = 'mongodb://' + cfg.host + ':' + cfg.port;
+      const ds = global.getDataSource(cfg);
+      ds.once('connected', function() {
+        const db = ds.connector.db;
+        let validationError = null;
+        try {
+          db.should.have.property('databaseName', testDb); // check the db name in the db instance
+        } catch (err) {
+          // async error
+          validationError = err;
+        }
+        ds.ping(function(err) {
+          if (err && !validationError) validationError = err;
+          ds.disconnect(function(disconnectError) {
+            if (disconnectError && !validationError)
+              validationError = disconnectError;
+            done(validationError);
+          });
+        });
+      });
+    });
+
+    it('should honor the url database if both replicaset url and settings has db', function(done) {
+      const cfg = JSON.parse(JSON.stringify(global.config));
+      const testDb = 'lb-ds-overriden-test-1';
+      cfg.url = 'mongodb://' + cfg.host + ':' + cfg.port + ',' + cfg.host + ':' + cfg.port + '/' + testDb;
+      const ds = global.getDataSource(cfg);
+      ds.once('connected', function() {
+        const db = ds.connector.db;
+        let validationError = null;
+        try {
+          db.should.have.property('databaseName', testDb); // check the db name in the db instance
+        } catch (err) {
+          // async error
+          validationError = err;
+        }
+        ds.ping(function(err) {
+          if (err && !validationError) validationError = err;
+          ds.disconnect(function(disconnectError) {
+            if (disconnectError && !validationError)
+              validationError = disconnectError;
+            done(validationError);
+          });
+        });
+      });
+    });
+
+    it("should honor the settings database if replicaset url doesn't have db has slash", function(done) {
+      const cfg = JSON.parse(JSON.stringify(global.config));
+      const testDb = cfg.database;
+      cfg.url = 'mongodb://' + cfg.host + ':' + cfg.port + ',' + cfg.host + ':' + cfg.port + '/';
+      const ds = global.getDataSource(cfg);
+      ds.once('connected', function() {
+        const db = ds.connector.db;
+        let validationError = null;
+        try {
+          db.should.have.property('databaseName', testDb); // check the db name in the db instance
+        } catch (err) {
+          // async error
+          validationError = err;
+        }
+        ds.ping(function(err) {
+          if (err && !validationError) validationError = err;
+          ds.disconnect(function(disconnectError) {
+            if (disconnectError && !validationError)
+              validationError = disconnectError;
+            done(validationError);
+          });
+        });
+      });
+    });
   });
 
   describe('order filters', function() {