diff --git a/src/api/config.js b/src/api/config.js
index 582362bb6..670a3265e 100644
--- a/src/api/config.js
+++ b/src/api/config.js
@@ -1,31 +1,64 @@
 'use strict'
 
-const argCommand = require('../cmd-helpers').argCommand
+const streamifier = require('streamifier')
 
 module.exports = (send) => {
   return {
-    get: argCommand(send, 'config'),
-    set (key, value, opts, cb) {
-      if (typeof (opts) === 'function') {
-        cb = opts
+    get (key, callback) {
+      if (typeof key === 'function') {
+        callback = key
+        key = undefined
+      }
+
+      if (!key) {
+        return send('config/show', null, null, null, true, callback)
+      }
+
+      return send('config', key, null, null, (err, result) => {
+        if (err) {
+          return callback(err)
+        }
+        callback(null, result.Value)
+      })
+    },
+    set (key, value, opts, callback) {
+      if (typeof opts === 'function') {
+        callback = opts
         opts = {}
       }
+      if (typeof key !== 'string') {
+        return callback(new Error('Invalid key type'))
+      }
+
+      if (typeof value !== 'object' &&
+          typeof value !== 'boolean' &&
+          typeof value !== 'string') {
+        return callback(new Error('Invalid value type'))
+      }
 
-      if (typeof (value) === 'object') {
+      if (typeof value === 'object') {
         value = JSON.stringify(value)
         opts = { json: true }
-      } else if (typeof (value) === 'boolean') {
+      }
+
+      if (typeof value === 'boolean') {
         value = value.toString()
         opts = { bool: true }
       }
 
-      return send('config', [key, value], opts, null, cb)
-    },
-    show (cb) {
-      return send('config/show', null, null, null, true, cb)
+      return send('config', [key, value], opts, null, callback)
     },
-    replace (file, cb) {
-      return send('config/replace', null, null, file, cb)
+    replace (config, callback) {
+      // Its a path
+      if (typeof config === 'string') {
+        return send('config/replace', null, null, config, callback)
+      }
+
+      // Its a config obj
+      if (typeof config === 'object') {
+        config = streamifier.createReadStream(new Buffer(JSON.stringify(config)))
+        return send('config/replace', null, null, config, callback)
+      }
     }
   }
 }
diff --git a/src/get-files-stream.js b/src/get-files-stream.js
index f723b34fd..485e06cce 100644
--- a/src/get-files-stream.js
+++ b/src/get-files-stream.js
@@ -93,7 +93,9 @@ function loadPaths (opts, file) {
 }
 
 function getFilesStream (files, opts) {
-  if (!files) return null
+  if (!files) {
+    return null
+  }
 
   const mp = new Multipart()
 
diff --git a/src/request-api.js b/src/request-api.js
index a5c01ea4c..a8a48b944 100644
--- a/src/request-api.js
+++ b/src/request-api.js
@@ -32,7 +32,8 @@ function onRes (buffer, cb, uri) {
 
     const stream = Boolean(res.headers['x-stream-output'])
     const chunkedObjects = Boolean(res.headers['x-chunked-output'])
-    const isJson = res.headers['content-type'] && res.headers['content-type'].indexOf('application/json') === 0
+    const isJson = res.headers['content-type'] &&
+                   res.headers['content-type'].indexOf('application/json') === 0
 
     if (res.statusCode >= 400 || !res.statusCode) {
       const error = new Error(`Server responded with ${res.statusCode}`)
@@ -96,7 +97,7 @@ function requestAPI (config, path, args, qs, files, buffer, cb) {
   const port = config.port ? `:${config.port}` : ''
 
   const opts = {
-    method: files ? 'POST' : 'GET',
+    method: 'POST',
     uri: `${config.protocol}://${config.host}${port}${config['api-path']}${path}?${Qs.stringify(qs, {arrayFormat: 'repeat'})}`,
     headers: {}
   }
@@ -112,7 +113,6 @@ function requestAPI (config, path, args, qs, files, buffer, cb) {
     }
 
     opts.headers['Content-Type'] = `multipart/form-data; boundary=${stream.boundary}`
-    opts.downstreamRes = stream
     opts.payload = stream
   }
 
diff --git a/test/api/config.spec.js b/test/api/config.spec.js
index 86914958e..0d87e0363 100644
--- a/test/api/config.spec.js
+++ b/test/api/config.spec.js
@@ -3,133 +3,15 @@
 /* globals apiClients */
 'use strict'
 
-const expect = require('chai').expect
-const isNode = require('detect-node')
-const path = require('path')
-
-describe('.config', () => {
-  describe('.config.{set, get}', () => {
-    it('string', (done) => {
-      const confKey = 'arbitraryKey'
-      const confVal = 'arbitraryVal'
-
-      apiClients.a.config.set(confKey, confVal, (err, res) => {
-        expect(err).to.not.exist
-        apiClients.a.config.get(confKey, (err, res) => {
-          expect(err).to.not.exist
-          expect(res).to.have.a.property('Value', confVal)
-          done()
-        })
-      })
-    })
-
-    it('bool', (done) => {
-      const confKey = 'otherKey'
-      const confVal = true
-
-      apiClients.a.config.set(confKey, confVal, (err, res) => {
-        expect(err).to.not.exist
-        apiClients.a.config.get(confKey, (err, res) => {
-          expect(err).to.not.exist
-          expect(res.Value).to.deep.equal(confVal)
-          done()
-        })
-      })
-    })
-
-    it('json', (done) => {
-      const confKey = 'API.HTTPHeaders.Access-Control-Allow-Origin'
-      const confVal = ['http://example.io']
-
-      apiClients.a.config.set(confKey, confVal, (err, res) => {
-        expect(err).to.not.exist
-        apiClients.a.config.get(confKey, (err, res) => {
-          expect(err).to.not.exist
-          expect(res.Value).to.deep.equal(confVal)
-          done()
-        })
-      })
-    })
-  })
-
-  it('.config.show', (done) => {
-    apiClients.c.config.show((err, res) => {
-      expect(err).to.not.exist
-      expect(res).to.exist
-      done()
-    })
-  })
-
-  it('.config.replace', (done) => {
-    if (!isNode) {
-      return done()
-    }
-
-    apiClients.c.config.replace(path.join(__dirname, '/../r-config.json'), (err, res) => {
-      expect(err).to.not.exist
-      expect(res).to.be.equal(null)
-      done()
-    })
-  })
-
-  describe('promise', () => {
-    describe('.config.{set, get}', () => {
-      it('string', () => {
-        const confKey = 'arbitraryKey'
-        const confVal = 'arbitraryVal'
-
-        return apiClients.a.config.set(confKey, confVal)
-          .then((res) => {
-            return apiClients.a.config.get(confKey)
-          })
-          .then((res) => {
-            expect(res).to.have.a.property('Value', confVal)
-          })
-      })
-
-      it('bool', () => {
-        const confKey = 'otherKey'
-        const confVal = true
-
-        return apiClients.a.config.set(confKey, confVal)
-          .then((res) => {
-            return apiClients.a.config.get(confKey)
-          })
-          .then((res) => {
-            expect(res.Value).to.deep.equal(confVal)
-          })
-      })
-
-      it('json', () => {
-        const confKey = 'API.HTTPHeaders.Access-Control-Allow-Origin'
-        const confVal = ['http://example.com']
-
-        return apiClients.a.config.set(confKey, confVal)
-          .then((res) => {
-            return apiClients.a.config.get(confKey)
-          })
-          .then((res) => {
-            expect(res.Value).to.deep.equal(confVal)
-          })
-      })
-    })
-
-    it('.config.show', () => {
-      return apiClients.c.config.show()
-        .then((res) => {
-          expect(res).to.exist
-        })
-    })
-
-    it('.config.replace', () => {
-      if (!isNode) {
-        return
-      }
-
-      return apiClients.c.config.replace(path.join(__dirname, '/../r-config.json'))
-        .then((res) => {
-          expect(res).to.be.equal(null)
-        })
-    })
-  })
-})
+const test = require('interface-ipfs-core')
+
+const common = {
+  setup: function (cb) {
+    cb(null, apiClients.a)
+  },
+  teardown: function (cb) {
+    cb()
+  }
+}
+
+test.config(common)