diff --git a/package-lock.json b/package-lock.json
index fcbc95a..28ebcaa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,32 @@
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+        "es-abstract": "^1.17.5"
+      }
+    },
     "string_decoder": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
@@ -1627,6 +2213,15 @@
         "thenify": ">= 3.1.0 < 4"
       }
     },
+    "to-regex-range": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+      "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+      "dev": true,
+      "requires": {
+        "is-number": "^7.0.0"
+      }
+    },
     "tough-cookie": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.5.0.tgz",
@@ -1638,81 +2233,77 @@
       }
     },
     "ts-node": {
-      "version": "3.3.0",
-      "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-3.3.0.tgz",
-      "integrity": "sha1-wTxqMCTjC+EYDdUwOPwgkonUv2k=",
+      "version": "9.0.0",
+      "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-9.0.0.tgz",
+      "integrity": "sha512-/TqB4SnererCDR/vb4S/QvSZvzQMJN8daAslg7MeaiHvD8rDZsSfXmNeNumyZZzMned72Xoq/isQljYSt8Ynfg==",
       "dev": true,
       "requires": {
-        "arrify": "^1.0.0",
-        "chalk": "^2.0.0",
-        "diff": "^3.1.0",
+        "arg": "^4.1.0",
+        "diff": "^4.0.1",
         "make-error": "^1.1.1",
-        "minimist": "^1.2.0",
-        "mkdirp": "^0.5.1",
-        "source-map-support": "^0.4.0",
-        "tsconfig": "^6.0.0",
-        "v8flags": "^3.0.0",
-        "yn": "^2.0.0"
+        "source-map-support": "^0.5.17",
+        "yn": "3.1.1"
       },
       "dependencies": {
-        "minimist": {
-          "version": "1.2.0",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
-          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
-          "dev": true
-        }
-      }
-    },
-    "tsconfig": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/tsconfig/-/tsconfig-6.0.0.tgz",
-      "integrity": "sha1-aw6DdgA9evGGT434+J3QBZ/80DI=",
-      "dev": true,
-      "requires": {
-        "strip-bom": "^3.0.0",
-        "strip-json-comments": "^2.0.0"
-      },
-      "dependencies": {
-        "strip-bom": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
-          "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=",
+        "diff": {
+          "version": "4.0.2",
+          "resolved": "https://registry.npmjs.org/diff/-/diff-4.0.2.tgz",
+          "integrity": "sha512-58lmxKSA4BNyLz+HHMUzlOEpg09FV+ev6ZMe3vJihgdxzgcwZ8VoEEPmALCZG9LmqfVoNMMKpttIYTVG6uDY7A==",
           "dev": true
         }
       }
     },
     "tslib": {
-      "version": "1.8.0",
-      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.8.0.tgz",
-      "integrity": "sha512-ymKWWZJST0/CkgduC2qkzjMOWr4bouhuURNXCn/inEX0L57BnRG6FhX76o7FOnsjHazCjfU2LKeSrlS2sIKQJg==",
+      "version": "1.13.0",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.13.0.tgz",
+      "integrity": "sha512-i/6DQjL8Xf3be4K/E6Wgpekn5Qasl1usyw++dAA35Ue5orEn65VIxOA+YvNNl9HV3qv70T7CNwjODHZrLwvd1Q==",
       "dev": true
     },
     "tslint": {
-      "version": "5.8.0",
-      "resolved": "https://registry.npmjs.org/tslint/-/tslint-5.8.0.tgz",
-      "integrity": "sha1-H0mtWy53x2w69N3K5VKuTjYS6xM=",
+      "version": "6.1.3",
+      "resolved": "https://registry.npmjs.org/tslint/-/tslint-6.1.3.tgz",
+      "integrity": "sha512-IbR4nkT96EQOvKE2PW/djGz8iGNeJ4rF2mBfiYaR/nvUWYKJhLwimoJKgjIFEIDibBtOevj7BqCRL4oHeWWUCg==",
       "dev": true,
       "requires": {
-        "babel-code-frame": "^6.22.0",
+        "@babel/code-frame": "^7.0.0",
         "builtin-modules": "^1.1.1",
-        "chalk": "^2.1.0",
-        "commander": "^2.9.0",
-        "diff": "^3.2.0",
+        "chalk": "^2.3.0",
+        "commander": "^2.12.1",
+        "diff": "^4.0.1",
         "glob": "^7.1.1",
+        "js-yaml": "^3.13.1",
         "minimatch": "^3.0.4",
+        "mkdirp": "^0.5.3",
         "resolve": "^1.3.2",
         "semver": "^5.3.0",
-        "tslib": "^1.7.1",
-        "tsutils": "^2.12.1"
+        "tslib": "^1.13.0",
+        "tsutils": "^2.29.0"
+      },
+      "dependencies": {
+        "minimist": {
+          "version": "1.2.5",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
+          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
+          "dev": true
+        },
+        "mkdirp": {
+          "version": "0.5.5",
+          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
+          "integrity": "sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==",
+          "dev": true,
+          "requires": {
+            "minimist": "^1.2.5"
+          }
+        }
       }
     },
     "tsutils": {
-      "version": "2.12.2",
-      "resolved": "https://registry.npmjs.org/tsutils/-/tsutils-2.12.2.tgz",
-      "integrity": "sha1-rVikhl0X7D3bZjG2ylO+FKVlb/M=",
+      "version": "2.29.0",
+      "resolved": "https://registry.npmjs.org/tsutils/-/tsutils-2.29.0.tgz",
+      "integrity": "sha512-g5JVHCIJwzfISaXpXE1qvNalca5Jwob6FjI4AoPlqMusJ6ftFE7IkkFoMhVLRgK+4Kx3gkzb8UZK5t5yTTvEmA==",
       "dev": true,
       "requires": {
-        "tslib": "^1.7.1"
+        "tslib": "^1.8.1"
       }
     },
     "tunnel-agent": {
@@ -1850,15 +2441,6 @@
       "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
       "dev": true
     },
-    "v8flags": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.0.1.tgz",
-      "integrity": "sha1-3Oj8N5wX2fLJ6e142JzgAFKxt2s=",
-      "dev": true,
-      "requires": {
-        "homedir-polyfill": "^1.0.1"
-      }
-    },
     "verror": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
@@ -1870,6 +2452,15 @@
         "extsprintf": "^1.2.0"
       }
     },
+    "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"
+      }
+    },
     "which-module": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
@@ -1918,6 +2509,12 @@
         }
       }
     },
+    "workerpool": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.0.0.tgz",
+      "integrity": "sha512-fU2OcNA/GVAJLLyKUoHkAgIhKb0JoCpSjLC/G2vYKxUjVmQwGbRVeoPJ1a8U4pnVofz4AQV5Y/NEw8oKqxEBtA==",
+      "dev": true
+    },
     "wrap-ansi": {
       "version": "6.2.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
@@ -2197,10 +2794,163 @@
         }
       }
     },
+    "yargs-unparser": {
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.6.1.tgz",
+      "integrity": "sha512-qZV14lK9MWsGCmcr7u5oXGH0dbGqZAIxTDrWXZDo5zUr6b6iUmelNKO6x6R1dQT24AH3LgRxJpr8meWy2unolA==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^5.3.1",
+        "decamelize": "^1.2.0",
+        "flat": "^4.1.0",
+        "is-plain-obj": "^1.1.0",
+        "yargs": "^14.2.3"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+          "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
+          "dev": true
+        },
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "dev": true,
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "cliui": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/cliui/-/cliui-5.0.0.tgz",
+          "integrity": "sha512-PYeGSEmmHM6zvoef2w8TPzlrnNpXIjTipYK780YswmIP9vjxmd6Y2a3CB2Ks6/AU8NHjZugXvo8w3oWM2qnwXA==",
+          "dev": true,
+          "requires": {
+            "string-width": "^3.1.0",
+            "strip-ansi": "^5.2.0",
+            "wrap-ansi": "^5.1.0"
+          }
+        },
+        "decamelize": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
+          "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=",
+          "dev": true
+        },
+        "emoji-regex": {
+          "version": "7.0.3",
+          "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-7.0.3.tgz",
+          "integrity": "sha512-CwBLREIQ7LvYFB0WyRvwhq5N5qPhc6PMjD6bYggFlI5YyDgl+0vxq5VHbMOFqLg7hfWzmu8T5Z1QofhmTIhItA==",
+          "dev": true
+        },
+        "find-up": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-3.0.0.tgz",
+          "integrity": "sha512-1yD6RmLI1XBfxugvORwlck6f75tYL+iR0jqwsOrOxMZyGYqUuDhJ0l4AXdO1iX/FTs9cBAMEk1gWSEx1kSbylg==",
+          "dev": true,
+          "requires": {
+            "locate-path": "^3.0.0"
+          }
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "locate-path": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",
+          "integrity": "sha512-7AO748wWnIhNqAuaty2ZWHkQHRSNfPVIsPIfwEOWO22AmaoVrWavlOcMR5nzTLNYvp36X220/maaRsrec1G65A==",
+          "dev": true,
+          "requires": {
+            "p-locate": "^3.0.0",
+            "path-exists": "^3.0.0"
+          }
+        },
+        "p-locate": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-3.0.0.tgz",
+          "integrity": "sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==",
+          "dev": true,
+          "requires": {
+            "p-limit": "^2.0.0"
+          }
+        },
+        "path-exists": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
+          "integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU=",
+          "dev": true
+        },
+        "string-width": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
+          "dev": true,
+          "requires": {
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
+          "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^4.1.0"
+          }
+        },
+        "wrap-ansi": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-5.1.0.tgz",
+          "integrity": "sha512-QC1/iN/2/RPVJ5jYK8BGttj5z83LmSKmvbvrXPNCLZSEb32KKVDJDl/MOt2N01qU2H/FkzEa9PKto1BqDjtd7Q==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.0",
+            "string-width": "^3.0.0",
+            "strip-ansi": "^5.0.0"
+          }
+        },
+        "yargs": {
+          "version": "14.2.3",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-14.2.3.tgz",
+          "integrity": "sha512-ZbotRWhF+lkjijC/VhmOT9wSgyBQ7+zr13+YLkhfsSiTriYsMzkTUFP18pFhWwBeMa5gUc1MzbhrO6/VB7c9Xg==",
+          "dev": true,
+          "requires": {
+            "cliui": "^5.0.0",
+            "decamelize": "^1.2.0",
+            "find-up": "^3.0.0",
+            "get-caller-file": "^2.0.1",
+            "require-directory": "^2.1.1",
+            "require-main-filename": "^2.0.0",
+            "set-blocking": "^2.0.0",
+            "string-width": "^3.0.0",
+            "which-module": "^2.0.0",
+            "y18n": "^4.0.0",
+            "yargs-parser": "^15.0.1"
+          }
+        },
+        "yargs-parser": {
+          "version": "15.0.1",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-15.0.1.tgz",
+          "integrity": "sha512-0OAMV2mAZQrs3FkNpDQcBk1x5HXb8X4twADss4S0Iuk+2dGnLOE/fRHrsYm542GduMveyA77OF4wrNJuanRCWw==",
+          "dev": true,
+          "requires": {
+            "camelcase": "^5.0.0",
+            "decamelize": "^1.2.0"
+          }
+        }
+      }
+    },
     "yn": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/yn/-/yn-2.0.0.tgz",
-      "integrity": "sha1-5a2ryKz0CPY4X8dklWhMiOavaJo=",
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
+      "integrity": "sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==",
       "dev": true
     }
   }
diff --git a/package.json b/package.json
index 70aaf41..d5dfc0c 100644
--- a/package.json
+++ b/package.json
@@ -5,15 +5,15 @@
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
   "devDependencies": {
-    "@types/chai": "^4.0.5",
-    "@types/mocha": "^2.2.44",
-    "@types/node": "^9.6.0",
+    "@types/chai": "^4.2.13",
+    "@types/mocha": "^8.0.3",
+    "@types/node": "^14.11.2",
     "chai": "^4.1.2",
-    "mocha": "^4.0.1",
+    "mocha": "^8.1.3",
     "prettier": "^2.0.5",
     "sqlite3": "^4.1.1",
-    "ts-node": "^3.3.0",
-    "tslint": "^5.8.0",
+    "ts-node": "^9.0.0",
+    "tslint": "^6.1.3",
     "typeorm": "^0.2.25",
     "typescript": "^3.3.3333"
   },
diff --git a/src/crypto.ts b/src/crypto.ts
index 42730be..42bd297 100644
--- a/src/crypto.ts
+++ b/src/crypto.ts
@@ -48,6 +48,8 @@ export function decryptData(data: Buffer, options: EncryptionOptions): Buffer {
   let dataToUse = data.slice(options.ivLength);
 
   if (hasAuthTag(options.algorithm)) {
+    // Add ts-ignore due to build error TS2339: Property 'setAuthTag' does not exist on type 'Decipher'.
+    // @ts-ignore
     decipher.setAuthTag(dataToUse.slice(0, authTagLength));
     dataToUse = dataToUse.slice(authTagLength);
   }
diff --git a/test/active-record.test.ts b/test/active-record.test.ts
index 8ec8cb3..e160f2b 100644
--- a/test/active-record.test.ts
+++ b/test/active-record.test.ts
@@ -1,10 +1,16 @@
 import { expect } from 'chai';
 import { encrypt, decrypt } from '../src/entity';
-import { withConnection } from './utils';
+import { getConnection } from './utils';
 import ColumnOptionsEntity1 from './entities/ColumnOptionsEntity1';
 
-describe('Column Options - Active Record', () => {
-  it('should encrypt', () => {
+describe('Column Options - Active Record', function() {
+  this.timeout(10000);
+
+  before(async function () {
+    await getConnection();
+  })
+
+  it('should encrypt', function() {
     let result = new ColumnOptionsEntity1();
     result.secret = 'test';
     encrypt(result);
@@ -13,26 +19,23 @@ describe('Column Options - Active Record', () => {
     );
   });
 
-  it('should decrypt', () => {
+  it('should decrypt', function() {
     let result = new ColumnOptionsEntity1();
     result.secret = '/1rBkZBCSx2I+UGe+UmuVhKzmHsDDv0EvRtMBFiaE3A=';
     decrypt(result);
     expect(result.secret).to.equal('test');
   });
 
-  it('should automatically encrypt and decrypt', (done) => {
-    withConnection(async () => {
-      let result = new ColumnOptionsEntity1();
-      result.secret = 'test';
-      await result.save();
-      expect(result.secret).to.equal(
-        '/1rBkZBCSx2I+UGe+UmuVhKzmHsDDv0EvRtMBFiaE3A='
-      );
+  it('should automatically encrypt and decrypt', async function() {
+    let result = new ColumnOptionsEntity1();
+    result.secret = 'test';
+    await result.save();
+    expect(result.secret).to.equal(
+      '/1rBkZBCSx2I+UGe+UmuVhKzmHsDDv0EvRtMBFiaE3A='
+    );
 
-      let results = await ColumnOptionsEntity1.find();
-      expect(results.length).to.equal(1);
-      expect(results[0].secret).to.equal('test');
-      done();
-    });
+    let results = await ColumnOptionsEntity1.find();
+    expect(results.length).to.equal(1);
+    expect(results[0].secret).to.equal('test');
   });
 });
diff --git a/test/crypto.test.ts b/test/crypto.test.ts
index e548ea5..2925f5a 100644
--- a/test/crypto.test.ts
+++ b/test/crypto.test.ts
@@ -1,8 +1,8 @@
 import { expect } from 'chai';
 import { encryptData, decryptData } from '../src/crypto';
 
-describe('Crypto', () => {
-  it('should encrypt', () => {
+describe('Crypto', function() {
+  it('should encrypt', function() {
     let result = encryptData(Buffer.from('test', 'utf8'), {
       key: 'e41c966f21f9e1577802463f8924e6a3fe3e9751f201304213b2f845d8841d61',
       algorithm: 'aes-256-cbc',
@@ -14,7 +14,7 @@ describe('Crypto', () => {
     );
   });
 
-  it('should decrypt', () => {
+  it('should decrypt', function() {
     let result = decryptData(
       Buffer.from('/1rBkZBCSx2I+UGe+UmuVhKzmHsDDv0EvRtMBFiaE3A=', 'base64'),
       {
diff --git a/test/data-mapper.test.ts b/test/data-mapper.test.ts
index 292d4b4..b3ad96b 100644
--- a/test/data-mapper.test.ts
+++ b/test/data-mapper.test.ts
@@ -1,20 +1,26 @@
 import { expect } from 'chai';
 import { Connection } from 'typeorm';
-import { withConnection } from './utils';
+import { getConnection } from './utils';
 import ColumnOptionsEntity2 from './entities/ColumnOptionsEntity2';
 
-describe('Column Options - Data Mapper', () => {
-  it('should automatically encrypt and decrypt with loose matching', async () => {
-    await withConnection(async (connection: Connection) => {
-      const repo = connection.getRepository(ColumnOptionsEntity2);
-      let result = await repo.save({ looseSecret: 'test' });
-      expect(result.looseSecret).to.equal(
-        '/1rBkZBCSx2I+UGe+UmuVhKzmHsDDv0EvRtMBFiaE3A='
-      );
+describe('Column Options - Data Mapper', function() {
+  let connection: Connection;
 
-      let results = await repo.find();
-      expect(results.length).to.equal(1);
-      expect(results[0].looseSecret).to.equal('test');
-    });
+  this.timeout(10000);
+
+  before(async function () {
+    connection = await getConnection();
+  })
+
+  it('should automatically encrypt and decrypt with loose matching', async function() {
+    const repo = connection.getRepository(ColumnOptionsEntity2);
+    let result = await repo.save({ looseSecret: 'test' });
+    expect(result.looseSecret).to.equal(
+      '/1rBkZBCSx2I+UGe+UmuVhKzmHsDDv0EvRtMBFiaE3A='
+    );
+
+    let results = await repo.find();
+    expect(results.length).to.equal(1);
+    expect(results[0].looseSecret).to.equal('test');
   });
 });
diff --git a/test/transformer.test.ts b/test/transformer.test.ts
index 69e56ef..363409a 100644
--- a/test/transformer.test.ts
+++ b/test/transformer.test.ts
@@ -1,6 +1,6 @@
 import { expect } from 'chai';
 import { Connection } from 'typeorm';
-import { withConnection } from './utils';
+import { getConnection } from './utils';
 import TransformerOptionsEntityEmptyString1 from './entities/TransformerOptionsEntityEmptyString1';
 import TransformerOptionsEntity1 from './entities/TransformerOptionsEntity1';
 import TransformerOptionsEntityNullable1 from './entities/TransformerOptionsEntityNullable1';
@@ -8,147 +8,135 @@ import TransformerOptionsEntityNullable2 from './entities/TransformerOptionsEnti
 import TransformerOptionsAES256GCMEntity1 from './entities/TransformerOptionsAES256GCMEntity1';
 import TransformerOptionsAES256GCMEntity2 from './entities/TransformerOptionsAES256GCMEntity2';
 
-describe('Transformer', () => {
-  it('should automatically encrypt and decrypt', async () => {
-    await withConnection(async (connection: Connection) => {
-      const manager = connection.manager;
-      const repo = connection.getRepository(TransformerOptionsEntity1);
-      const instance = await repo.create({ secret: 'test' });
-      await repo.save(instance);
+describe('Transformer', function() {
+  let connection: Connection;
 
-      const result = await manager.query(
-        'SELECT secret FROM transformer_options_entity1'
-      );
+  this.timeout(10000);
 
-      expect(result[0].secret).to.equal(
-        '/1rBkZBCSx2I+UGe+UmuVhKzmHsDDv0EvRtMBFiaE3A='
-      );
+  before(async function () {
+    connection = await getConnection();
+  })
 
-      const results = await repo.find();
+  it('should automatically encrypt and decrypt', async function() {
+    const manager = connection.manager;
+    const repo = connection.getRepository(TransformerOptionsEntity1);
+    const instance = await repo.create({ secret: 'test' });
+    await repo.save(instance);
 
-      expect(results.length).to.equal(1);
-      expect(results[0].secret).to.equal('test');
-    });
+    const result = await manager.query(
+      'SELECT secret FROM transformer_options_entity1'
+    );
+
+    expect(result[0].secret).to.equal(
+      '/1rBkZBCSx2I+UGe+UmuVhKzmHsDDv0EvRtMBFiaE3A='
+    );
+
+    const results = await repo.find();
+
+    expect(results.length).to.equal(1);
+    expect(results[0].secret).to.equal('test');
   });
 
-  it('should automatically encrypt and decrypt aes-256-gcm', async () => {
-    await withConnection(async (connection: Connection) => {
-      const manager = connection.manager;
-      const repo = connection.getRepository(TransformerOptionsAES256GCMEntity1);
-      const instance = await repo.create({ secret: 'test' });
-      await repo.save(instance);
+  it('should automatically encrypt and decrypt aes-256-gcm', async function() {
+    const manager = connection.manager;
+    const repo = connection.getRepository(TransformerOptionsAES256GCMEntity1);
+    const instance = await repo.create({ secret: 'test' });
+    await repo.save(instance);
 
-      const result = await manager.query(
-        'SELECT secret FROM transformer_options_entity1'
-      );
+    const result = await manager.query(
+      'SELECT secret FROM transformer_options_entity1'
+    );
 
-      expect(result[0].secret).to.equal(
-        '/1rBkZBCSx2I+UGe+UmuVhKzmHsDDv0EvRtMBFiaE3A='
-      );
+    expect(result[0].secret).to.equal(
+      '/1rBkZBCSx2I+UGe+UmuVhKzmHsDDv0EvRtMBFiaE3A='
+    );
 
-      const results = await repo.find();
+    const results = await repo.find();
 
-      expect(results.length).to.equal(1);
-      expect(results[0].secret).to.equal('test');
-    });
+    expect(results.length).to.equal(1);
+    expect(results[0].secret).to.equal('test');
   });
 
-  it('should automatically encrypt and decrypt aes-256-gcm with 8-byte long auth tag length', (done) => {
-    withConnection(async (connection: Connection) => {
-      const manager = connection.manager;
-      const repo = connection.getRepository(TransformerOptionsAES256GCMEntity2);
-      const instance = await repo.create({ secret: 'test' });
-      await repo.save(instance);
+  it('should automatically encrypt and decrypt aes-256-gcm with 8-byte long auth tag length', async function() {
+    const manager = connection.manager;
+    const repo = connection.getRepository(TransformerOptionsAES256GCMEntity2);
+    const instance = await repo.create({ secret: 'test' });
+    await repo.save(instance);
 
-      const result = await manager.query(
-        'SELECT secret FROM transformer_options_entity1'
-      );
+    const result = await manager.query(
+      'SELECT secret FROM transformer_options_entity1'
+    );
 
-      expect(result[0].secret).to.equal(
-        '/1rBkZBCSx2I+UGe+UmuVhKzmHsDDv0EvRtMBFiaE3A='
-      );
+    expect(result[0].secret).to.equal(
+      '/1rBkZBCSx2I+UGe+UmuVhKzmHsDDv0EvRtMBFiaE3A='
+    );
 
-      const results = await repo.find();
+    const results = await repo.find();
 
-      expect(results.length).to.equal(1);
-      expect(results[0].secret).to.equal('test');
-
-      done();
-    });
+    expect(results.length).to.equal(1);
+    expect(results[0].secret).to.equal('test');
   });
 
-  it('should not encrypt / decrypt null values', (done) => {
-    withConnection(async (connection: Connection) => {
-      const manager = connection.manager;
-      const repo = connection.getRepository(TransformerOptionsEntityNullable1);
-      const instance = await repo.create({ secret: null });
-      await repo.save(instance);
+  it('should not encrypt / decrypt null values', async function() {
+    const manager = connection.manager;
+    const repo = connection.getRepository(TransformerOptionsEntityNullable1);
+    const instance = await repo.create({ secret: null });
 
-      const result = await manager.query(
-        'SELECT secret FROM transformer_options_entity_nullable1'
-      );
-      
+    await repo.save(instance);
 
-      expect(result[0].secret).to.equal(
-        null
-      );
+    const result = await manager.query(
+      'SELECT secret FROM transformer_options_entity_nullable1'
+    );
 
-      const results = await repo.find();
+    expect(result[0].secret).to.equal(
+      null
+    );
 
-      expect(results.length).to.equal(1);
-      expect(results[0].secret).to.equal(undefined);
+    const results = await repo.find();
 
-      done()
-    });
+    expect(results.length).to.equal(1);
+    expect(results[0].secret).to.equal(undefined);
   });
 
-  it('should not encrypt / decrypt undefined values', (done) => {
-    withConnection(async (connection: Connection) => {
-      const manager = connection.manager;
-      const repo = connection.getRepository(TransformerOptionsEntityNullable2);
-      const instance = await repo.create({ secret: undefined });
-      await repo.save(instance);
-
-      const result = await manager.query(
-        'SELECT secret FROM transformer_options_entity_nullable2'
-      );
-      
+  it('should not encrypt / decrypt undefined values', async function() {
+    const manager = connection.manager;
+    const repo = connection.getRepository(TransformerOptionsEntityNullable2);
+    const instance = await repo.create({ secret: undefined });
+    await repo.save(instance);
 
-      expect(result[0].secret).to.equal(
-        null
-      );
+    const result = await manager.query(
+      'SELECT secret FROM transformer_options_entity_nullable2'
+    );
+    
 
-      const results = await repo.find();
+    expect(result[0].secret).to.equal(
+      null
+    );
 
-      expect(results.length).to.equal(1);
-      expect(results[0].secret).to.equal(undefined);
+    const results = await repo.find();
 
-      done()
-    });
+    expect(results.length).to.equal(1);
+    expect(results[0].secret).to.equal(undefined);
   });
 
-  it('should encrypt / decrypt empty strings', (done) => {
-    withConnection(async (connection: Connection) => {
-      const manager = connection.manager;
-      const repo = connection.getRepository(TransformerOptionsEntityEmptyString1);
-      const instance = await repo.create({ secret: '' });
-      await repo.save(instance);
-
-      const result = await manager.query(
-        'SELECT secret FROM transformer_options_entity_empty_string1'
-      );
-      
+  it('should encrypt / decrypt empty strings', async function() {
+    const manager = connection.manager;
+    const repo = connection.getRepository(TransformerOptionsEntityEmptyString1);
+    const instance = await repo.create({ secret: '' });
+    await repo.save(instance);
 
-      expect(result[0].secret).to.equal(
-        '/1rBkZBCSx2I+UGe+UmuVvnjveB6onZ3uoKZCOZfzbk='
-      );
+    const result = await manager.query(
+      'SELECT secret FROM transformer_options_entity_empty_string1'
+    );
+    
 
-      const results = await repo.find();
+    expect(result[0].secret).to.equal(
+      '/1rBkZBCSx2I+UGe+UmuVvnjveB6onZ3uoKZCOZfzbk='
+    );
 
-      expect(results.length).to.equal(1);
-      expect(results[0].secret).to.equal('');
+    const results = await repo.find();
 
-      done()
-    });
+    expect(results.length).to.equal(1);
+    expect(results[0].secret).to.equal('');
   });
 });
diff --git a/test/utils.ts b/test/utils.ts
index 5a3bf13..2ea3be2 100644
--- a/test/utils.ts
+++ b/test/utils.ts
@@ -1,20 +1,33 @@
 import { createConnection, Connection } from "typeorm";
+
 import { AutoEncryptSubscriber } from "../src/subscribers";
 
 let CONNECTION: Connection;
+let LOCK = false;
+
+export async function getConnection(): Promise<Connection> {
+  try {
+    while (LOCK) {
+      await new Promise((resolve) => setTimeout(resolve, 100));
+    }
+
+    LOCK = true;
+
+    if (!CONNECTION) {
+      CONNECTION = await createConnection({
+        "type": "sqlite",
+        "database": `/tmp/test.${process.pid}.sqlite`,
+        "synchronize": true,
+        "logging": false,
+        "entities": [
+          "**/entities/**/*.ts"
+        ],
+        "subscribers": [ AutoEncryptSubscriber ]
+      });
+    }
 
-export async function withConnection (callback: Function): Promise<any> {
-  if (!CONNECTION) {
-    CONNECTION = await createConnection({
-      "type": "sqlite",
-      "database": `/tmp/test.${process.pid}.sqlite`,
-      "synchronize": true,
-      "logging": false,
-      "entities": [
-        "**/entities/**/*.ts"
-      ],
-      "subscribers": [ AutoEncryptSubscriber ]
-    });
+    return CONNECTION;
+  } finally {
+    LOCK = false;
   }
-  return await Promise.resolve(callback(CONNECTION));
 }