diff --git a/README.md b/README.md
index 3b00aa7..b48f3af 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ a simple abstraction around grpc.Server
 
 * **server(an optional {})**
   - **address** string with the format `url:port`
-  - **creedentials** can use `credentials.createInsecure` or with certificates through an object { key, server }
+  - **credentials** can use `credentials.createInsecure` or with certificates through an object { key, server }, passed as a Buffer
   - **metadata** set metadata that can be used in all calls, an array with { key: value }
 
 **methods**
diff --git a/index.js b/index.js
index 3c66c41..e75ef27 100644
--- a/index.js
+++ b/index.js
@@ -14,8 +14,9 @@ class GrpcServer {
 
   constructor (config = {}) {
     const address = config.address || '0.0.0.0:50051'
-    const creedentials = setAuthentication(config.creedentials) ||
-      ServerCredentials.createInsecure()
+    const creedentials = isObject(config.credentials)
+      ? setAuthentication(config.credentials)
+      : ServerCredentials.createInsecure()
 
     this._server = new Server()
     this._server.bind(address, creedentials)
@@ -68,12 +69,12 @@ module.exports = function factory (config) {
 
 function setAuthentication (certs) {
 
-  return isObject(certs) && ServerCredentials.createSsl(
+  return ServerCredentials.createSsl(
     null,
     [
       {
-        'cert_chain': Buffer.from(certs.server),
-        'private_key': Buffer.from(certs.key)
+        'cert_chain': certs.server,
+        'private_key': certs.key
       }
     ]
   )
diff --git a/package.json b/package.json
index ad6bbb6..fccf0ba 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc.server",
-  "version": "2.0.0",
+  "version": "3.0.0",
   "description": "a simple abstraction around grpc.Server",
   "main": "index.js",
   "files": [
@@ -32,7 +32,7 @@
   "devDependencies": {
     "chai": "^4.0.2",
     "coveralls": "^2.13.1",
-    "grpc.client": "^2.0.2",
+    "grpc.client": "^3.2.1",
     "mocha": "^3.4.2",
     "node-forge": "^0.7.1",
     "nyc": "^11.0.2",
@@ -41,7 +41,7 @@
   },
   "dependencies": {
     "get-property-value": "^2.0.0",
-    "grpc": "^1.3.7",
+    "grpc": "^1.3.8",
     "is.object": "^1.0.0"
   },
   "nyc": {
diff --git a/test/create-certificates.js b/test/create-certificates.js
deleted file mode 100644
index b296bd7..0000000
--- a/test/create-certificates.js
+++ /dev/null
@@ -1,113 +0,0 @@
-'use strict'
-
-const { pki } = require('node-forge')
-
-const attrs = [
-  {
-    name: 'commonName',
-    value: 'example.org'
-  },
-  {
-    name: 'countryName',
-    value: 'GB'
-  },
-  {
-    shortName: 'ST',
-    value: 'ElDorado'
-  },
-  {
-    name: 'localityName',
-    value: 'Benfica'
-  },
-  {
-    name: 'organizationName',
-    value: 'Test'
-  },
-  {
-    shortName: 'OU',
-    value: 'Test'
-  }
-]
-
-const exts = [
-  {
-    name: 'basicConstraints',
-    cA: true
-  },
-  {
-    name: 'keyUsage',
-    keyCertSign: true,
-    digitalSignature: true,
-    nonRepudiation: true,
-    keyEncipherment: true,
-    dataEncipherment: true
-  },
-  {
-    name: 'extKeyUsage',
-    serverAuth: true,
-    clientAuth: true,
-    codeSigning: true,
-    emailProtection: true,
-    timeStamping: true
-  },
-  {
-    name: 'nsCertType',
-    client: true,
-    server: true,
-    email: true,
-    objsign: true,
-    sslCA: true,
-    emailCA: true,
-    objCA: true
-  },
-  {
-    name: 'subjectAltName',
-    altNames: [
-      {
-        type: 6, // URI
-        value: 'http://example.org/webid#me'
-      },
-      {
-        type: 7, // IP
-        ip: '127.0.0.1'
-      }
-    ]
-  },
-  {
-    name: 'subjectKeyIdentifier'
-  }
-]
-
-module.exports = createCertificate
-
-function createCertificate (cb) {
-  pki.rsa.generateKeyPair({ bits: 1024 }, generateKeyPair)
-
-  function generateKeyPair (err, keyPair) {
-    if (err) {
-      return cb(err)
-    }
-
-    const cert = pki.createCertificate()
-
-    cert.publicKey = keyPair.publicKey
-    cert.serialNumber = '01'
-    cert.validity.notBefore = new Date()
-    cert.validity.notAfter = new Date()
-    cert.validity.notAfter
-      .setFullYear(cert.validity.notBefore.getFullYear() + 1)
-    cert.setSubject(attrs)
-    cert.setIssuer(attrs)
-    cert.setExtensions(exts)
-
-    cert.sign(keyPair.privateKey)
-
-    const pem = {
-      privateKey: pki.privateKeyToPem(keyPair.privateKey),
-      publicKey: pki.publicKeyToPem(keyPair.publicKey),
-      certificate: pki.certificateToPem(cert)
-    }
-
-    cb(null, pem)
-  }
-}
diff --git a/test/fixtures/certs/01.pem b/test/fixtures/certs/01.pem
new file mode 100644
index 0000000..6ebed1e
--- /dev/null
+++ b/test/fixtures/certs/01.pem
@@ -0,0 +1,81 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 1 (0x1)
+    Signature Algorithm: sha256WithRSAEncryption
+        Issuer: C=GB, ST=London, L=London, O=?Test PLC, OU=TEST, CN=Test Node Dev Root Cert
+        Validity
+            Not Before: Jun 18 14:26:56 2017 GMT
+            Not After : Jun 18 14:26:56 2018 GMT
+        Subject: C=GB, ST=London, L=London, O=Test , OU=TEST, CN=localhost
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                Public-Key: (2048 bit)
+                Modulus:
+                    00:a1:31:b4:86:41:f1:a6:1c:99:e9:52:f2:72:4f:
+                    50:06:82:51:18:e5:0b:a4:97:3e:2d:3e:c6:2a:59:
+                    18:10:8b:fc:1b:27:58:67:5d:c9:6e:79:fc:70:fc:
+                    4b:06:8c:17:be:85:20:d6:2c:d2:91:4b:ac:4a:53:
+                    45:7a:8c:01:7a:08:0e:6b:42:cf:ea:f0:54:95:e1:
+                    ff:f4:83:6a:e7:aa:89:53:6c:ae:c3:45:82:ce:0f:
+                    f1:07:0b:4d:bd:00:b1:d1:96:cb:77:6a:33:e7:68:
+                    e1:62:70:a3:cf:93:ae:bf:f5:12:a3:4d:f2:b9:df:
+                    b1:fc:43:cd:a7:f5:d4:91:3f:b4:74:df:27:f2:7f:
+                    af:ac:11:41:ab:4b:5c:20:35:f1:81:73:ad:6a:32:
+                    5a:39:32:1e:87:e2:bc:a5:1a:00:e8:4b:6c:d2:59:
+                    96:1c:2f:c7:31:7b:07:53:81:71:eb:2e:06:5c:cc:
+                    87:3d:22:2d:f3:1f:15:58:f2:8c:0f:e3:03:46:d0:
+                    95:64:b1:6b:cc:8d:3e:8b:7a:a3:17:2b:99:16:5a:
+                    3e:b5:e3:17:5a:ca:aa:a7:24:53:8c:51:cf:66:70:
+                    92:03:cf:44:52:d8:9e:66:84:6e:6d:ea:83:64:2e:
+                    3b:d1:81:49:0b:ff:3f:72:0a:d7:4f:2f:64:b0:d4:
+                    09:3d
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Subject Key Identifier: 
+                F2:21:73:69:C0:A8:E4:F4:CC:91:3A:3A:16:35:19:9B:A8:A7:C1:7B
+            X509v3 Authority Key Identifier: 
+                keyid:C8:56:A6:E9:D4:2A:DF:19:49:80:E9:AD:60:6B:15:31:D0:B0:F4:BC
+
+            X509v3 Basic Constraints: 
+                CA:FALSE
+            X509v3 Key Usage: 
+                Digital Signature, Key Encipherment
+    Signature Algorithm: sha256WithRSAEncryption
+         ab:b7:10:ff:f8:a3:f5:61:75:a2:37:e8:b5:9d:24:c7:f5:10:
+         3e:3d:d9:4a:87:ec:b2:63:5c:77:db:64:ec:3d:5a:eb:d2:77:
+         9b:c3:fa:4e:3e:66:6e:70:68:22:25:db:e6:21:c0:f2:d6:41:
+         f0:4b:65:8e:92:d4:24:68:66:9f:e0:a3:b8:3e:df:02:33:24:
+         e6:e0:5c:08:9c:93:46:ed:e6:c4:58:0f:57:ce:e2:dc:ea:dc:
+         2e:a3:1f:94:05:ca:c0:2b:08:0e:b9:a2:5f:6f:db:ff:68:6c:
+         11:3d:a4:ee:21:1d:1e:47:c6:13:fe:05:16:d7:18:0b:37:95:
+         dd:e9:53:50:12:09:39:f2:70:66:88:3e:33:16:d1:e6:6b:b1:
+         e9:f1:ba:77:27:4c:a5:b4:31:6e:17:a4:b2:1e:ee:27:a2:6e:
+         bb:d4:cd:ec:ba:55:18:a2:68:7a:59:4c:8d:39:8e:c2:6e:3a:
+         48:fd:30:16:ab:91:de:ea:88:63:62:73:19:76:be:b9:01:70:
+         70:c3:3c:97:07:e0:38:a3:ac:59:d7:37:d8:1e:9e:18:33:57:
+         70:c1:a6:92:75:68:06:50:87:87:0f:7d:4e:62:46:48:ee:18:
+         4e:8b:06:91:e1:b2:c8:37:9f:28:92:ce:ef:09:be:4a:82:92:
+         ef:d9:65:76
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/test/fixtures/certs/ca.cfg b/test/fixtures/certs/ca.cfg
new file mode 100644
index 0000000..d2d90e9
--- /dev/null
+++ b/test/fixtures/certs/ca.cfg
@@ -0,0 +1,86 @@
+[ ca ]
+default_ca                     = CA_default
+
+[ CA_default ]
+base_dir                       = "./"
+# how long to certify for
+default_days                   = 365
+# how long before next CRL
+default_crl_days               = 365
+# use public key default MD
+default_md                     = sha256
+# keep passed DN ordering
+preserve                       = no
+
+# The extensions to add to the cert
+x509_extensions                = ca_extensions
+
+# Don't concat the email in the DN
+email_in_dn                    = no
+# Required to copy SANs from CSR to cert
+copy_extensions                = copy
+
+# The CA certifcate
+certificate                    = $base_dir/ca.crt
+# The CA private key
+private_key                    = $base_dir/ca_private.key
+# Location for new certs after signing
+new_certs_dir                  = $base_dir
+# Database index file
+database                       = $base_dir/index.txt
+# The current serial number
+serial                         = $base_dir/serial.txt
+
+unique_subject  = no            # Set to 'no' to allow creation of
+                # several certificates with same subject.
+
+[ req ]
+default_bits                   = 2048
+default_keyfile                = ./ca_private.key
+distinguished_name             = ca_distinguished_name
+x509_extensions                = ca_extensions
+string_mask                    = utf8only
+
+[ ca_distinguished_name ]
+countryName                    = Country Name (2 letter code)
+countryName_default            = GB
+
+stateOrProvinceName            = State or Province Name (full name)
+stateOrProvinceName_default    = London
+
+localityName                   = Locality Name (eg, city)
+localityName_default           = London
+
+organizationName               = Organization Name (eg, company)
+organizationName_default       = Test
+
+organizationalUnitName         = Organizational Unit (eg, division)
+organizationalUnitName_default = TEST
+
+commonName                     = Common Name (e.g. server FQDN or YOUR name)
+commonName_default             = Test Node Dev Root Cert
+
+emailAddress                   = Email Address
+emailAddress_default           = admin
+
+[ ca_extensions ]
+
+subjectKeyIdentifier           = hash
+authorityKeyIdentifier         = keyid:always, issuer
+basicConstraints               = critical, CA:true
+keyUsage                       = keyCertSign, cRLSign
+
+[ signing_policy ]
+countryName                    = optional
+stateOrProvinceName            = optional
+localityName                   = optional
+organizationName               = optional
+organizationalUnitName         = optional
+commonName                     = supplied
+emailAddress                   = optional
+
+[ signing_req ]
+subjectKeyIdentifier           = hash
+authorityKeyIdentifier         = keyid,issuer
+basicConstraints               = CA:FALSE
+keyUsage                       = digitalSignature, keyEncipherment
diff --git a/test/fixtures/certs/ca.crt b/test/fixtures/certs/ca.crt
new file mode 100644
index 0000000..74a14c2
--- /dev/null
+++ b/test/fixtures/certs/ca.crt
@@ -0,0 +1,23 @@
+-----BEGIN CERTIFICATE-----
+MIIDyzCCArOgAwIBAgIJALfONEf3eW4AMA0GCSqGSIb3DQEBCwUAMHQxCzAJBgNV
+BAYTAkdCMQ8wDQYDVQQIDAZMb25kb24xDzANBgNVBAcMBkxvbmRvbjESMBAGA1UE
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+qYfd3qlsQE8u0dqbytIv
+-----END CERTIFICATE-----
diff --git a/test/fixtures/certs/ca_private.key b/test/fixtures/certs/ca_private.key
new file mode 100644
index 0000000..f6eb35d
--- /dev/null
+++ b/test/fixtures/certs/ca_private.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvwIBADANBgkqhkiG9w0BAQEFAASCBKkwggSlAgEAAoIBAQDqR0sYok0IA6Je
+kKcJ0Oz9w0AQ9bY/FwUqQvh0oO/mBIAbNMeRD9FeV/zBieQZDv++GDwWKeOi0WZb
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+NiLczvZPvJ/U8L6NtXdW49saYcsRfZx6pH98j1nvmQKBgQCRZoZUQFWh38BclfBf
+X2ZwQTL8HdAr2PdgUM2iDC/pCBBzxRq4pGkCjm0gwWPjljT4N9yCMF95DhSvjD+G
+n1gS9VSpFbkH69AwggMdyF16lIqOhmK/LKyZbzrlSHNbrrFK3r6ipft/M061v/4s
+pKzfU3EGJKCJeu1yAHNvFvPcpw==
+-----END PRIVATE KEY-----
diff --git a/test/fixtures/certs/generate-ca-certificate.sh b/test/fixtures/certs/generate-ca-certificate.sh
new file mode 100644
index 0000000..9cf61f2
--- /dev/null
+++ b/test/fixtures/certs/generate-ca-certificate.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+set -e
+
+echo "--->  Generate the ROOT Private Key"
+openssl genrsa 4096 \
+    -out ./ca_private.key
+
+echo "--->  Generate the ROOT CA CRT"
+openssl req \
+    -x509 \
+    -config ./ca.cfg \
+    -newkey rsa:2048 \
+    -sha256 \
+    -nodes \
+    -out ./ca.crt \
+    -outform PEM \
+    -subj "/C=GB/ST=London/L=London/O=?Test PLC/OU=TEST/CN=Test Node Dev Root Cert"
+
+openssl x509 \
+    -in ./ca.crt \
+    -text -noout
+
+openssl x509 \
+    -purpose \
+    -in ./ca.crt \
+    -inform PEM
+
+touch ./index.txt
+echo "01" > ./serial.txt
+
+echo
+echo "**********************"
+echo "***** Successful *****"
+echo "**********************"
diff --git a/test/fixtures/certs/generate-server-certificate.sh b/test/fixtures/certs/generate-server-certificate.sh
new file mode 100644
index 0000000..59722e5
--- /dev/null
+++ b/test/fixtures/certs/generate-server-certificate.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+set -e
+
+ls ca_private.key ca.crt || echo "Run generate_ca_certificate.sh first"
+
+echo "--->  Generate the SERVER key"
+openssl genrsa 4096 \
+    -out ./server_private.key \
+
+echo "--->  Generate the SERVER CSR"
+openssl req \
+    -config ./server.cfg \
+    -newkey rsa:2048 \
+    -sha256 \
+    -nodes \
+    -out ./server.csr \
+    -outform PEM \
+    -subj "/C=GB/ST=London/L=London/O=Test /OU=TEST/CN=localhost"
+
+openssl req \
+    -text \
+    -noout \
+    -verify \
+    -in ./server.csr
+
+echo "--->  Generate the SERVER Certificate attached to ROOT CA"
+openssl ca \
+    -config ./ca.cfg \
+    -policy signing_policy \
+    -extensions signing_req \
+    -out ./server.crt \
+    -infiles ./server.csr
+
+echo "--->  Remove server.csr"
+rm ./server.csr
+
+echo
+echo "**********************"
+echo "***** Successful *****"
+echo "**********************"
diff --git a/test/fixtures/certs/index.txt b/test/fixtures/certs/index.txt
new file mode 100644
index 0000000..4f93ba9
--- /dev/null
+++ b/test/fixtures/certs/index.txt
@@ -0,0 +1 @@
+V	180618142656Z		01	unknown	/C=GB/ST=London/L=London/O=Test /OU=TEST/CN=localhost
diff --git a/test/fixtures/certs/index.txt.attr b/test/fixtures/certs/index.txt.attr
new file mode 100644
index 0000000..3a7e39e
--- /dev/null
+++ b/test/fixtures/certs/index.txt.attr
@@ -0,0 +1 @@
+unique_subject = no
diff --git a/test/fixtures/certs/serial.txt b/test/fixtures/certs/serial.txt
new file mode 100644
index 0000000..9e22bcb
--- /dev/null
+++ b/test/fixtures/certs/serial.txt
@@ -0,0 +1 @@
+02
diff --git a/test/fixtures/certs/server.cfg b/test/fixtures/certs/server.cfg
new file mode 100644
index 0000000..a1679c0
--- /dev/null
+++ b/test/fixtures/certs/server.cfg
@@ -0,0 +1,28 @@
+[ req ]
+default_bits                = 2048
+default_keyfile             = ./server_private.key
+distinguished_name          = server_distinguished_name
+req_extensions              = server_req_extensions
+string_mask                 = utf8only
+
+[ server_distinguished_name ]
+countryName                 = Country Name (2 letter code)
+countryName_default         = W
+
+stateOrProvinceName         = State or Province Name (full name)
+stateOrProvinceName_default = World
+
+localityName                = Locality Name (eg, city)
+localityName_default        = World
+
+rganizationName             = Organization Name (eg, company)
+organizationName_default    = Test
+
+commonName                  = Common Name (e.g. server FQDN or YOUR name)
+commonName_default          = TEST
+
+[ server_req_extensions ]
+
+subjectKeyIdentifier        = hash
+basicConstraints            = CA:FALSE
+keyUsage                    = digitalSignature, keyEncipherment
diff --git a/test/fixtures/certs/server.crt b/test/fixtures/certs/server.crt
new file mode 100644
index 0000000..6ebed1e
--- /dev/null
+++ b/test/fixtures/certs/server.crt
@@ -0,0 +1,81 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 1 (0x1)
+    Signature Algorithm: sha256WithRSAEncryption
+        Issuer: C=GB, ST=London, L=London, O=?Test PLC, OU=TEST, CN=Test Node Dev Root Cert
+        Validity
+            Not Before: Jun 18 14:26:56 2017 GMT
+            Not After : Jun 18 14:26:56 2018 GMT
+        Subject: C=GB, ST=London, L=London, O=Test , OU=TEST, CN=localhost
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                Public-Key: (2048 bit)
+                Modulus:
+                    00:a1:31:b4:86:41:f1:a6:1c:99:e9:52:f2:72:4f:
+                    50:06:82:51:18:e5:0b:a4:97:3e:2d:3e:c6:2a:59:
+                    18:10:8b:fc:1b:27:58:67:5d:c9:6e:79:fc:70:fc:
+                    4b:06:8c:17:be:85:20:d6:2c:d2:91:4b:ac:4a:53:
+                    45:7a:8c:01:7a:08:0e:6b:42:cf:ea:f0:54:95:e1:
+                    ff:f4:83:6a:e7:aa:89:53:6c:ae:c3:45:82:ce:0f:
+                    f1:07:0b:4d:bd:00:b1:d1:96:cb:77:6a:33:e7:68:
+                    e1:62:70:a3:cf:93:ae:bf:f5:12:a3:4d:f2:b9:df:
+                    b1:fc:43:cd:a7:f5:d4:91:3f:b4:74:df:27:f2:7f:
+                    af:ac:11:41:ab:4b:5c:20:35:f1:81:73:ad:6a:32:
+                    5a:39:32:1e:87:e2:bc:a5:1a:00:e8:4b:6c:d2:59:
+                    96:1c:2f:c7:31:7b:07:53:81:71:eb:2e:06:5c:cc:
+                    87:3d:22:2d:f3:1f:15:58:f2:8c:0f:e3:03:46:d0:
+                    95:64:b1:6b:cc:8d:3e:8b:7a:a3:17:2b:99:16:5a:
+                    3e:b5:e3:17:5a:ca:aa:a7:24:53:8c:51:cf:66:70:
+                    92:03:cf:44:52:d8:9e:66:84:6e:6d:ea:83:64:2e:
+                    3b:d1:81:49:0b:ff:3f:72:0a:d7:4f:2f:64:b0:d4:
+                    09:3d
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Subject Key Identifier: 
+                F2:21:73:69:C0:A8:E4:F4:CC:91:3A:3A:16:35:19:9B:A8:A7:C1:7B
+            X509v3 Authority Key Identifier: 
+                keyid:C8:56:A6:E9:D4:2A:DF:19:49:80:E9:AD:60:6B:15:31:D0:B0:F4:BC
+
+            X509v3 Basic Constraints: 
+                CA:FALSE
+            X509v3 Key Usage: 
+                Digital Signature, Key Encipherment
+    Signature Algorithm: sha256WithRSAEncryption
+         ab:b7:10:ff:f8:a3:f5:61:75:a2:37:e8:b5:9d:24:c7:f5:10:
+         3e:3d:d9:4a:87:ec:b2:63:5c:77:db:64:ec:3d:5a:eb:d2:77:
+         9b:c3:fa:4e:3e:66:6e:70:68:22:25:db:e6:21:c0:f2:d6:41:
+         f0:4b:65:8e:92:d4:24:68:66:9f:e0:a3:b8:3e:df:02:33:24:
+         e6:e0:5c:08:9c:93:46:ed:e6:c4:58:0f:57:ce:e2:dc:ea:dc:
+         2e:a3:1f:94:05:ca:c0:2b:08:0e:b9:a2:5f:6f:db:ff:68:6c:
+         11:3d:a4:ee:21:1d:1e:47:c6:13:fe:05:16:d7:18:0b:37:95:
+         dd:e9:53:50:12:09:39:f2:70:66:88:3e:33:16:d1:e6:6b:b1:
+         e9:f1:ba:77:27:4c:a5:b4:31:6e:17:a4:b2:1e:ee:27:a2:6e:
+         bb:d4:cd:ec:ba:55:18:a2:68:7a:59:4c:8d:39:8e:c2:6e:3a:
+         48:fd:30:16:ab:91:de:ea:88:63:62:73:19:76:be:b9:01:70:
+         70:c3:3c:97:07:e0:38:a3:ac:59:d7:37:d8:1e:9e:18:33:57:
+         70:c1:a6:92:75:68:06:50:87:87:0f:7d:4e:62:46:48:ee:18:
+         4e:8b:06:91:e1:b2:c8:37:9f:28:92:ce:ef:09:be:4a:82:92:
+         ef:d9:65:76
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/test/fixtures/certs/server_private.key b/test/fixtures/certs/server_private.key
new file mode 100644
index 0000000..070f812
--- /dev/null
+++ b/test/fixtures/certs/server_private.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/test/index.js b/test/index.js
index 20dfc50..eb26323 100644
--- a/test/index.js
+++ b/test/index.js
@@ -7,13 +7,12 @@ max-len: ["error", 80]
 'use strict'
 
 const { describe, it, before } = require('mocha')
-const { expect }  = require('chai')
-const client      = require('grpc.client')
+const { expect }        = require('chai')
+const client            = require('grpc.client')
+const { readFileSync }  = require('fs')
 
 const server = require('../')
 
-const certificates = require('./create-certificates')
-
 var serverCerts = {}
 var clientCerts = {}
 
@@ -37,22 +36,22 @@ describe('gRPC server', () => {
 
   before((done) => {
 
-    certificates((_, pem) => {
-      serverCerts = {
-        key: pem.privateKey,
-        server: pem.certificate
-      }
+    const key = readFileSync('test/fixtures/certs/server_private.key')
+    const crt = readFileSync('test/fixtures/certs/server.crt')
+    const ca = readFileSync('test/fixtures/certs/ca.crt')
 
-      certificates((__, _pem) => {
-        clientCerts = {
-          ca: pem.certificate,
-          key: _pem.privateKey,
-          client: _pem.certificate
-        }
+    serverCerts = {
+      key: key,
+      server: crt
+    }
 
-        done()
-      })
-    })
+    clientCerts = {
+      ca: ca,
+      key: key,
+      client: crt
+    }
+
+    done()
   })
 
   it('should throw an error when not passing any service', (done) => {
@@ -68,7 +67,7 @@ describe('gRPC server', () => {
     (done) => {
       let serverA = server(
         {
-          creedentials: serverCerts,
+          credentials: serverCerts,
           address: '127.0.0.1:50052'
         }
       )
@@ -105,18 +104,28 @@ describe('gRPC server', () => {
 
   it('should do a rpc call between server / client for an authenticated' +
     ' server / client',
-    (done) => {
+    function (done) {
+      this.timeout(120000)
       let serverA = server(
         {
-          creedentials: serverCerts,
-          address: '127.0.0.1:50052'
+          credentials: serverCerts,
+          address: 'localhost:50052'
         }
       )
 
+      const service = [
+        {
+          proto: protos.helloWorld,
+          package: 'helloWorld',
+          name: 'Greeter',
+          methods: { sayHello: sayHello }
+        }
+      ]
+
       serverA
-        .addServices(services)
+        .addServices(service)
         .start(() => {
-          client({ address: '127.0.0.1:50052', creedentials: clientCerts })
+          client({ address: 'localhost:50052', credentials: clientCerts })
             .service('Greeter', protos.helloWorld)
             .sayHello({ name: 'Scaramouche' })
             .end((err, res) => {