diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index 6fddb14..10b48eb 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -11,21 +11,15 @@ on:
 
 jobs:
   build:
-
-    runs-on: ubuntu-latest
-
+    runs-on: ${{ matrix.platform }}
     strategy:
       matrix:
         node-version: [10.x, 12.x]
-    
-    services:
-      mongodb:
-        image: mongo:3.4.23
-        ports:
-          - 27017:27017
+        platform: [windows-latest, macos-latest, ubuntu-latest]
+        mongodb-version: [3.6]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v1
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v1
       with:
@@ -34,3 +28,6 @@ jobs:
     - run: npm test
       env:
         CI: true
+        TWILIO_ACCOUNT_SID: ACXXXXXX
+        TWILIO_AUTH_TOKEN: XXXXX
+        TWILIO_NUMBER: +1555555
diff --git a/.mergify.yml b/.mergify.yml
index 0433495..a75a993 100644
--- a/.mergify.yml
+++ b/.mergify.yml
@@ -2,12 +2,12 @@ pull_request_rules:
   - name: automatic merge for Dependabot pull requests
     conditions:
       - author=dependabot-preview[bot]
-      - status-success=build (macos-latest, 10)
-      - status-success=build (macos-latest, 12)
-      - status-success=build (windows-latest, 10)
-      - status-success=build (windows-latest, 12)
-      - status-success=build (ubuntu-latest, 10)
-      - status-success=build (ubuntu-latest, 12)
+      - status-success=build (10.x, macos-latest)
+      - status-success=build (12.x, macos-latest)
+      - status-success=build (10.x, windows-latest)
+      - status-success=build (12.x, windows-latest)
+      - status-success=build (10.x, ubuntu-latest)
+      - status-success=build (12.x, ubuntu-latest)
     actions:
       merge:
         method: squash
diff --git a/package-lock.json b/package-lock.json
index f1b4828..1d635dd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -34,6 +34,27 @@
         "@types/node": "*"
       }
     },
+    "@types/cross-spawn": {
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/@types/cross-spawn/-/cross-spawn-6.0.2.tgz",
+      "integrity": "sha512-KuwNhp3eza+Rhu8IFI5HUXRP0LIhqH5cAjubUvGXXthh4YYBuP2ntwEX+Cz8GJoZUHlKo247wPWOfA9LYEq4cw==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/debug": {
+      "version": "4.1.5",
+      "resolved": "https://registry.npmjs.org/@types/debug/-/debug-4.1.5.tgz",
+      "integrity": "sha512-Q1y515GcOdTHgagaVFhHnIFQ38ygs/kmxdNpvpou+raI9UO3YZcHDngBSYKQklcKlvA7iuQlmIKbzvmxcOE9CQ==",
+      "dev": true
+    },
+    "@types/dedent": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/@types/dedent/-/dedent-0.7.0.tgz",
+      "integrity": "sha512-EGlKlgMhnLt/cM4DbUSafFdrkeJoC9Mvnj0PUCU7tFmTjMjNRT957kXCx0wYm3JuEq4o4ZsS5vG+NlkM2DMd2A==",
+      "dev": true
+    },
     "@types/express": {
       "version": "4.17.3",
       "resolved": "https://registry.npmjs.org/@types/express/-/express-4.17.3.tgz",
@@ -53,11 +74,56 @@
         "@types/range-parser": "*"
       }
     },
+    "@types/find-cache-dir": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/@types/find-cache-dir/-/find-cache-dir-3.2.0.tgz",
+      "integrity": "sha512-+JeT9qb2Jwzw72WdjU+TSvD5O1QRPWCeRpDJV+guiIq+2hwR0DFGw+nZNbTFjMIVe6Bf4GgAKeB/6Ytx6+MbeQ==",
+      "dev": true
+    },
+    "@types/find-package-json": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@types/find-package-json/-/find-package-json-1.1.1.tgz",
+      "integrity": "sha512-XMCocYkg6VUpkbOQMKa3M5cgc3MvU/LJKQwd3VUJrWZbLr2ARUggupsCAF8DxjEEIuSO6HlnH+vl+XV4bgVeEQ==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/get-port": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/@types/get-port/-/get-port-4.2.0.tgz",
+      "integrity": "sha512-Iv2FAb5RnIk/eFO2CTu8k+0VMmIR15pKbcqRWi+s3ydW+aKXlN2yemP92SrO++ERyJx+p6Ie1ggbLBMbU1SjiQ==",
+      "dev": true,
+      "requires": {
+        "get-port": "*"
+      }
+    },
+    "@types/lockfile": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@types/lockfile/-/lockfile-1.0.1.tgz",
+      "integrity": "sha512-65WZedEm4AnOsBDdsapJJG42MhROu3n4aSSiu87JXF/pSdlubxZxp3S1yz3kTfkJ2KBPud4CpjoHVAptOm9Zmw==",
+      "dev": true
+    },
+    "@types/md5-file": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/@types/md5-file/-/md5-file-4.0.2.tgz",
+      "integrity": "sha512-8gacRfEqLrmZ6KofpFfxyjsm/LYepeWUWUJGaf5A9W9J5B2/dRZMdkDqFDL6YDa9IweH12IO76jO7mpsK2B3wg==",
+      "dev": true
+    },
     "@types/mime": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/@types/mime/-/mime-2.0.1.tgz",
       "integrity": "sha512-FwI9gX75FgVBJ7ywgnq/P7tw+/o1GUbtP0KzbtusLigAOgIgNISRK0ZPl4qertvXSIE8YbsVJueQ90cDt9YYyw=="
     },
+    "@types/mkdirp": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@types/mkdirp/-/mkdirp-1.0.1.tgz",
+      "integrity": "sha512-HkGSK7CGAXncr8Qn/0VqNtExEE+PHMWb+qlR1faHMao7ng6P3tAaoWWBMdva0gL5h4zprjIO89GJOLXsMcDm1Q==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/node": {
       "version": "13.9.2",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-13.9.2.tgz",
@@ -77,6 +143,18 @@
         "@types/mime": "*"
       }
     },
+    "@types/tmp": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/@types/tmp/-/tmp-0.1.0.tgz",
+      "integrity": "sha512-6IwZ9HzWbCq6XoQWhxLpDjuADodH/MKXRUIDFudvgjcVdjFknvmR+DNsoUeer4XPrEnrZs04Jj+kfV9pFsrhmA==",
+      "dev": true
+    },
+    "@types/uuid": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@types/uuid/-/uuid-7.0.0.tgz",
+      "integrity": "sha512-RiX1I0lK9WFLFqy2xOxke396f0wKIzk5sAll0tL4J4XDYJXURI7JOs96XQb3nP+2gEpQ/LutBb66jgiT5oQshQ==",
+      "dev": true
+    },
     "accepts": {
       "version": "1.3.7",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
@@ -86,6 +164,15 @@
         "negotiator": "0.6.2"
       }
     },
+    "agent-base": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-6.0.0.tgz",
+      "integrity": "sha512-j1Q7cSCqN+AwrmDd+pzgqc0/NpC655x2bUf5ZjRIO77DcNBFmh+OgRNzF6OKdCC9RSCb19fGd99+bhXFdkRNqw==",
+      "dev": true,
+      "requires": {
+        "debug": "4"
+      }
+    },
     "align-text": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
@@ -324,6 +411,12 @@
         "ieee754": "^1.1.4"
       }
     },
+    "buffer-crc32": {
+      "version": "0.2.13",
+      "resolved": "https://registry.npmjs.org/buffer-crc32/-/buffer-crc32-0.2.13.tgz",
+      "integrity": "sha1-DTM+PwDqxQqhRUq9MO+MKl2ackI=",
+      "dev": true
+    },
     "buffer-equal-constant-time": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz",
@@ -448,6 +541,12 @@
         "delayed-stream": "~1.0.0"
       }
     },
+    "commondir": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/commondir/-/commondir-1.0.1.tgz",
+      "integrity": "sha1-3dgA2gxmEnOTzKWVDqloo6rxJTs=",
+      "dev": true
+    },
     "component-emitter": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz",
@@ -536,6 +635,28 @@
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
       "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
     },
+    "cross-spawn": {
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
+      "integrity": "sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==",
+      "dev": true,
+      "requires": {
+        "path-key": "^3.1.0",
+        "shebang-command": "^2.0.0",
+        "which": "^2.0.1"
+      },
+      "dependencies": {
+        "which": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+          "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+          "dev": true,
+          "requires": {
+            "isexe": "^2.0.0"
+          }
+        }
+      }
+    },
     "dayjs": {
       "version": "1.8.23",
       "resolved": "https://registry.npmjs.org/dayjs/-/dayjs-1.8.23.tgz",
@@ -562,6 +683,12 @@
         "mimic-response": "^2.0.0"
       }
     },
+    "dedent": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/dedent/-/dedent-0.7.0.tgz",
+      "integrity": "sha1-JJXduvbrh0q7Dhvp3yLS5aVEMmw=",
+      "dev": true
+    },
     "deep-eql": {
       "version": "0.1.3",
       "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-0.1.3.tgz",
@@ -842,6 +969,15 @@
       "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g==",
       "dev": true
     },
+    "fd-slicer": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/fd-slicer/-/fd-slicer-1.1.0.tgz",
+      "integrity": "sha1-JcfInLH5B3+IkbvmHY85Dq4lbx4=",
+      "dev": true,
+      "requires": {
+        "pend": "~1.2.0"
+      }
+    },
     "file-uri-to-path": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz",
@@ -885,6 +1021,23 @@
         }
       }
     },
+    "find-cache-dir": {
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/find-cache-dir/-/find-cache-dir-3.3.1.tgz",
+      "integrity": "sha512-t2GDMt3oGC/v+BMwzmllWDuJF/xcDtE5j/fCGbqDD7OLuJkj0cfh1YSA5VKPvwMeLFLNDBkwOKZ2X85jGLVftQ==",
+      "dev": true,
+      "requires": {
+        "commondir": "^1.0.1",
+        "make-dir": "^3.0.2",
+        "pkg-dir": "^4.1.0"
+      }
+    },
+    "find-package-json": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/find-package-json/-/find-package-json-1.2.0.tgz",
+      "integrity": "sha512-+SOGcLGYDJHtyqHd87ysBhmaeQ95oWspDKnMXBrnQ9Eq4OkLNqejgoaD8xVWu6GPa0B6roa6KinCMEMcVeqONw==",
+      "dev": true
+    },
     "find-up": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/find-up/-/find-up-3.0.0.tgz",
@@ -1043,6 +1196,12 @@
       "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==",
       "dev": true
     },
+    "get-port": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/get-port/-/get-port-5.1.1.tgz",
+      "integrity": "sha512-g/Q1aTSDOxFpchXC4i8ZWvxA1lnPqx/JHqcpIw0/LX9T8x/GBbi6YnlN5nhaKIFkT8oFsscUKgDJYxfwfS6QsQ==",
+      "dev": true
+    },
     "github-from-package": {
       "version": "0.0.0",
       "resolved": "https://registry.npmjs.org/github-from-package/-/github-from-package-0.0.0.tgz",
@@ -1127,6 +1286,16 @@
         }
       }
     },
+    "https-proxy-agent": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-5.0.0.tgz",
+      "integrity": "sha512-EkYm5BcKUGiduxzSt3Eppko+PiNWNEpa4ySk9vTC6wDsQJW9rHSa+UhGNJoRYp7bz6Ht1eaRIa6QaJqO5rCFbA==",
+      "dev": true,
+      "requires": {
+        "agent-base": "6",
+        "debug": "4"
+      }
+    },
     "iconv-lite": {
       "version": "0.4.24",
       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
@@ -1362,6 +1531,15 @@
         "path-exists": "^3.0.0"
       }
     },
+    "lockfile": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/lockfile/-/lockfile-1.0.4.tgz",
+      "integrity": "sha512-cvbTwETRfsFh4nHsL1eGWapU1XFi5Ot9E85sWAwia7Y7EgB7vfqcZhTKZ+l7hCGxSPoushMv5GKhT5PdLv03WA==",
+      "dev": true,
+      "requires": {
+        "signal-exit": "^3.0.2"
+      }
+    },
     "lodash": {
       "version": "4.17.15",
       "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
@@ -1416,6 +1594,29 @@
       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
       "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc="
     },
+    "make-dir": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-3.1.0.tgz",
+      "integrity": "sha512-g3FeP20LNwhALb/6Cz6Dd4F2ngze0jz7tbzrD2wAV+o9FeNHe4rL+yK2md0J/fiSf1sa1ADhXqi5+oVwOM/eGw==",
+      "dev": true,
+      "requires": {
+        "semver": "^6.0.0"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
+          "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
+          "dev": true
+        }
+      }
+    },
+    "md5-file": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/md5-file/-/md5-file-4.0.0.tgz",
+      "integrity": "sha512-UC0qFwyAjn4YdPpKaDNw6gNxRf7Mcx7jC1UGCY4boCzgvU2Aoc1mOGzTtrjjLKhM5ivsnhoKpQVxKPp+1j1qwg==",
+      "dev": true
+    },
     "media-typer": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
@@ -1600,6 +1801,64 @@
         "saslprep": "^1.0.0"
       }
     },
+    "mongodb-memory-server": {
+      "version": "6.6.1",
+      "resolved": "https://registry.npmjs.org/mongodb-memory-server/-/mongodb-memory-server-6.6.1.tgz",
+      "integrity": "sha512-qnGpGE50snhS3IgKwiPlxnL5wFWPxWutqcCqlsbb68FKohaEIsvi/gMBqJbBLF2l2sQu4a4aJofuKFudSI38vQ==",
+      "dev": true,
+      "requires": {
+        "mongodb-memory-server-core": "6.6.1"
+      }
+    },
+    "mongodb-memory-server-core": {
+      "version": "6.6.1",
+      "resolved": "https://registry.npmjs.org/mongodb-memory-server-core/-/mongodb-memory-server-core-6.6.1.tgz",
+      "integrity": "sha512-k6YowfiHxUdGwR/AhXuyv1V3VW2NkA6VuICQfUqZGeqENsExbnL05oKpavAXrmCGxcabXZ3IMvcgmUwmlJAGng==",
+      "dev": true,
+      "requires": {
+        "@types/cross-spawn": "^6.0.1",
+        "@types/debug": "^4.1.5",
+        "@types/dedent": "^0.7.0",
+        "@types/find-cache-dir": "^3.2.0",
+        "@types/find-package-json": "^1.1.1",
+        "@types/get-port": "^4.0.1",
+        "@types/lockfile": "^1.0.1",
+        "@types/md5-file": "^4.0.1",
+        "@types/mkdirp": "^1.0.0",
+        "@types/tmp": "0.1.0",
+        "@types/uuid": "7.0.0",
+        "camelcase": "^5.3.1",
+        "cross-spawn": "^7.0.1",
+        "debug": "^4.1.1",
+        "dedent": "^0.7.0",
+        "find-cache-dir": "3.3.1",
+        "find-package-json": "^1.2.0",
+        "get-port": "5.1.1",
+        "https-proxy-agent": "5.0.0",
+        "lockfile": "^1.0.4",
+        "md5-file": "^4.0.0",
+        "mkdirp": "^1.0.3",
+        "mongodb": "^3.5.4",
+        "tar-stream": "^2.1.1",
+        "tmp": "^0.1.0",
+        "uuid": "^7.0.2",
+        "yauzl": "^2.10.0"
+      },
+      "dependencies": {
+        "camelcase": {
+          "version": "5.3.1",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
+          "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
+          "dev": true
+        },
+        "mkdirp": {
+          "version": "1.0.4",
+          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
+          "integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==",
+          "dev": true
+        }
+      }
+    },
     "mongoose": {
       "version": "5.9.5",
       "resolved": "https://registry.npmjs.org/mongoose/-/mongoose-5.9.5.tgz",
@@ -1907,6 +2166,12 @@
       "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
       "dev": true
     },
+    "path-key": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
+      "integrity": "sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q==",
+      "dev": true
+    },
     "path-parse": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.6.tgz",
@@ -1922,12 +2187,63 @@
       "resolved": "https://registry.npmjs.org/pause/-/pause-0.0.1.tgz",
       "integrity": "sha1-HUCLP9t2kjuVQ9lvtMnf1TXZy10="
     },
+    "pend": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/pend/-/pend-1.2.0.tgz",
+      "integrity": "sha1-elfrVQpng/kRUzH89GY9XI4AelA=",
+      "dev": true
+    },
     "picomatch": {
       "version": "2.2.1",
       "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.2.1.tgz",
       "integrity": "sha512-ISBaA8xQNmwELC7eOjqFKMESB2VIqt4PPDD0nsS95b/9dZXvVKOlz9keMSnoGGKcOHXfTvDD6WMaRoSc9UuhRA==",
       "dev": true
     },
+    "pkg-dir": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/pkg-dir/-/pkg-dir-4.2.0.tgz",
+      "integrity": "sha512-HRDzbaKjC+AOWVXxAU/x54COGeIv9eb+6CkDSQoNTt4XyWoIJvuPsXizxu/Fr23EiekbtZwmh1IcIG/l/a10GQ==",
+      "dev": true,
+      "requires": {
+        "find-up": "^4.0.0"
+      },
+      "dependencies": {
+        "find-up": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-4.1.0.tgz",
+          "integrity": "sha512-PpOwAdQ/YlXQ2vj8a3h8IipDuYRi3wceVQQGYWxNINccq40Anw7BlsEXCMbt1Zt+OLA6Fq9suIpIWD0OsnISlw==",
+          "dev": true,
+          "requires": {
+            "locate-path": "^5.0.0",
+            "path-exists": "^4.0.0"
+          }
+        },
+        "locate-path": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-5.0.0.tgz",
+          "integrity": "sha512-t7hw9pI+WvuwNJXwk5zVHpyhIqzg2qTlklJOf0mVxGSbe3Fp2VieZcduNYjaLDoy6p9uGpQEGWG87WpMKlNq8g==",
+          "dev": true,
+          "requires": {
+            "p-locate": "^4.1.0"
+          }
+        },
+        "p-locate": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-4.1.0.tgz",
+          "integrity": "sha512-R79ZZ/0wAxKGu3oYMlz8jy/kbhsNrS7SKZ7PxEHBgJ5+F2mtFW2fK2cOtBh1cHYkQsbzFV7I+EoRKe6Yt0oK7A==",
+          "dev": true,
+          "requires": {
+            "p-limit": "^2.2.0"
+          }
+        },
+        "path-exists": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
+          "integrity": "sha512-ak9Qy5Q7jYb2Wwcey5Fpvg2KoAc/ZIhLSLOSBmRmygPsGwkVVt0fZa0qrtMz+m6tJTAHfZQ8FnmB4MG4LWy7/w==",
+          "dev": true
+        }
+      }
+    },
     "pop-iterate": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/pop-iterate/-/pop-iterate-1.0.1.tgz",
@@ -2332,6 +2648,15 @@
         "align-text": "^0.1.1"
       }
     },
+    "rimraf": {
+      "version": "2.7.1",
+      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.7.1.tgz",
+      "integrity": "sha512-uWjbaKIK3T1OSVptzX7Nl6PvQ3qAGtKEtVRjRuazjfL3Bx5eI409VZSqgND+4UNnmzLVdPj9FqFJNPqBZFve4w==",
+      "dev": true,
+      "requires": {
+        "glob": "^7.1.3"
+      }
+    },
     "rootpath": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/rootpath/-/rootpath-0.1.2.tgz",
@@ -2458,6 +2783,21 @@
       "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.1.tgz",
       "integrity": "sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw=="
     },
+    "shebang-command": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
+      "integrity": "sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA==",
+      "dev": true,
+      "requires": {
+        "shebang-regex": "^3.0.0"
+      }
+    },
+    "shebang-regex": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-3.0.0.tgz",
+      "integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==",
+      "dev": true
+    },
     "sift": {
       "version": "7.0.1",
       "resolved": "https://registry.npmjs.org/sift/-/sift-7.0.1.tgz",
@@ -2700,6 +3040,15 @@
         }
       }
     },
+    "tmp": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.1.0.tgz",
+      "integrity": "sha512-J7Z2K08jbGcdA1kkQpJSqLF6T0tdQqpR2pnSUXsIchbPdTI9v3e85cLW0d6WDhwuAleOV71j2xWs8qMPfK7nKw==",
+      "dev": true,
+      "requires": {
+        "rimraf": "^2.6.3"
+      }
+    },
     "to-fast-properties": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/to-fast-properties/-/to-fast-properties-1.0.3.tgz",
@@ -2832,6 +3181,12 @@
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
       "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
     },
+    "uuid": {
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-7.0.3.tgz",
+      "integrity": "sha512-DPSke0pXhTZgoF/d+WSt2QaKMCFSfx7QegxEWT+JOuHF5aWrKEn0G+ztjuJg/gG8/ItK+rbPCD/yNv8yyih6Cg==",
+      "dev": true
+    },
     "vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
@@ -3043,6 +3398,16 @@
           }
         }
       }
+    },
+    "yauzl": {
+      "version": "2.10.0",
+      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
+      "integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
+      "dev": true,
+      "requires": {
+        "buffer-crc32": "~0.2.3",
+        "fd-slicer": "~1.1.0"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index ac6e135..e266e90 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "private": true,
   "scripts": {
     "start": "node ./bin/www",
-    "test": "export TWILIO_NUMBER=Your-Twilio-Phone-Number TWILIO_AUTH_TOKEN=Your-Twilio-Authy-Token TWILIO_ACCOUNT_SID=ACYour-Account-SID NODE_ENV=test && node_modules/.bin/mocha spec --exit"
+    "test": "node_modules/.bin/mocha spec --exit"
   },
   "engines": {
     "node": "^12"
@@ -32,6 +32,7 @@
   "devDependencies": {
     "chai": "^3.4.1",
     "mocha": "^7.1.1",
+    "mongodb-memory-server": "^6.5.2",
     "supertest": "^4.0.2",
     "xmldom": "^0.1.27",
     "xpath": "0.0.24"
diff --git a/spec/connectionHelper.js b/spec/connectionHelper.js
deleted file mode 100644
index 1e2964e..0000000
--- a/spec/connectionHelper.js
+++ /dev/null
@@ -1,6 +0,0 @@
-var mongoose = require('mongoose');
-exports.mongoConnection = mongoose.connect('mongodb://localhost/test', {
-  useNewUrlParser: true,
-  useUnifiedTopology: true
-});
-mongoose.Promise = Promise;
diff --git a/spec/db-handler.js b/spec/db-handler.js
new file mode 100644
index 0000000..d09179d
--- /dev/null
+++ b/spec/db-handler.js
@@ -0,0 +1,30 @@
+const mongoose = require('mongoose');
+const { MongoMemoryServer } = require('mongodb-memory-server');
+
+const mongod = new MongoMemoryServer({instance: {port: 27018, dbName:'accountsecuritytesting'}});
+
+module.exports.connect = async () => {
+    const uri = await mongod.getConnectionString();
+
+    const mongooseOpts = {
+        useNewUrlParser: true,
+        useUnifiedTopology: true
+    };
+
+    await mongoose.connect(uri, mongooseOpts);
+}
+
+module.exports.closeDatabase = async () => {
+    await mongoose.connection.dropDatabase();
+    await mongoose.connection.close();
+    await mongod.stop();
+}
+
+module.exports.clearDatabase = async () => {
+    const collections = mongoose.connection.collections;
+
+    for (const key in collections) {
+        const collection = collections[key];
+        await collection.deleteMany();
+    }
+}
diff --git a/spec/properties.spec.js b/spec/properties.spec.js
index 80a349f..7f4e13f 100644
--- a/spec/properties.spec.js
+++ b/spec/properties.spec.js
@@ -1,4 +1,4 @@
-require('./connectionHelper');
+const dbHandler = require('./db-handler');
 var passport = require('passport');
 var passportStub = require('passport-stub');
 var expect = require('chai').expect;
@@ -14,19 +14,15 @@ var imageUrl = 'http://images.com/example.png';
 var agent = supertest(app);
 
 describe('properties', function () {
-  after(function(done) {
-    Property.deleteMany({})
-      .then(function () {
-        User.deleteMany({}, done);
-      });
+  before(async () => await dbHandler.connect());
+
+  after(async () => {
+    await dbHandler.clearDatabase();
+    await dbHandler.closeDatabase()
   });
 
-  beforeEach(function(done) {
+  beforeEach(function() {
     passportStub.login({username: 'Bob'});
-    Property.deleteMany({})
-      .then(function () {
-        User.deleteMany({}, done);
-      });
   });
 
   describe('GET /properties', function () {
diff --git a/spec/reservations.spec.js b/spec/reservations.spec.js
index d43de0f..f43406c 100644
--- a/spec/reservations.spec.js
+++ b/spec/reservations.spec.js
@@ -1,4 +1,4 @@
-require('./connectionHelper');
+const dbHandler = require('./db-handler');
 var expect = require('chai').expect;
 var supertest = require('supertest');
 
@@ -14,24 +14,11 @@ var xpath = require('xpath');
 var dom = require('xmldom').DOMParser;
 
 describe('reservations', function () {
-  after(function(done) {
-    User.deleteMany({})
-      .then(function(){
-        return Property.deleteMany({})
-      })
-      .then(function() {
-        Reservation.deleteMany({}, done);
-      });
-  });
+  before(async () => await dbHandler.connect());
 
-  beforeEach(function(done) {
-    User.deleteMany({})
-      .then(function(){
-        return Property.deleteMany({})
-      })
-      .then(function() {
-        Reservation.deleteMany({}, done);
-      });
+  after(async () => {
+    await dbHandler.clearDatabase();
+    await dbHandler.closeDatabase()
   });
 
   describe('POST /reservations', function () {
diff --git a/spec/users.spec.js b/spec/users.spec.js
index b671901..869f25c 100644
--- a/spec/users.spec.js
+++ b/spec/users.spec.js
@@ -1,11 +1,18 @@
+const dbHandler = require('./db-handler');
 var expect = require('chai').expect
   , supertest = require('supertest')
-  , mongoose = require('mongoose')
   , app = require('../app')
 
 var agent = supertest(app);
 
 describe('users', function () {
+  before(async () => await dbHandler.connect());
+
+  after(async () => {
+    await dbHandler.clearDatabase();
+    await dbHandler.closeDatabase()
+  });
+
   describe('GET /users/new', function () {
     it('shows registration form', function (done) {
       agent