diff --git a/.travis.yml b/.travis.yml
index c6b7e1b004..4a69933281 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,4 @@
+version: ~> 1.0
 language: node_js
 node_js:
   - "8"
@@ -23,6 +24,7 @@ before_install:
       export LINK="gcc-5";
       export LINKXX="g++-5";
     fi
+  - git config --global core.autocrlf false
 
 after_success:
   npm run coverage
\ No newline at end of file
diff --git a/lib/database/filedown.js b/lib/database/filedown.js
index cf0118e23a..fe50c03d67 100644
--- a/lib/database/filedown.js
+++ b/lib/database/filedown.js
@@ -52,26 +52,46 @@ FileDown.prototype._put = function(key, value, options, callback) {
   // leveldb implementation that doesn't use a separate file for every key Soon(TM).
   accessQueue.execute(lKey, () => {
     // get a tmp file to write the contents to...
-    tmp.file((err, path, fd) => {
+    tmp.file((err, path, fd, cleanupTmpFile) => {
       if (err) {
         callback(err);
         accessQueue.next(lKey);
         return;
       }
 
-      // write the contents to that temp file
+      // write the value to our temporary file
       fs.writeFile(fd, value, "utf8", (err) => {
         if (err) {
+          cleanupTmpFile();
           callback(err);
           accessQueue.next(lKey);
           return;
         }
-        // move the temp file to its final destination
+
+        // It worked! Move the temporary file to its final destination
         fs.rename(path, lKey, (err) => {
-          callback(err);
+          if (err) {
+            cleanupTmpFile();
+            callback(err);
+            accessQueue.next(lKey);
+            return;
+          }
 
-          // if there is more work to be done on this key, do it.
-          accessQueue.next(lKey);
+          // make sure we close this file descriptor now that the file is no
+          // longer "temporary" (because we successfully moved it)
+          fs.close(fd, (err) => {
+            if (err) {
+              // at this point things seem to have worked, but juuuussttt in
+              // case `fs.close` fails, let's log some info so we can try to
+              // debug it
+              console.warn("An unexpected file descriptor close error occured: ", err);
+              cleanupTmpFile();
+            }
+            callback();
+
+            // if there is more work to be done on this key, do it.
+            accessQueue.next(lKey);
+          });
         });
       });
     });
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index d995d27851..ebb83f6563 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -13,17 +13,141 @@
         "@babel/highlight": "^7.0.0"
       }
     },
+    "@babel/core": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.8.3.tgz",
+      "integrity": "sha512-4XFkf8AwyrEG7Ziu3L2L0Cv+WyY47Tcsp70JFmpftbAA1K7YL/sgE9jh9HyNj08Y/U50ItUchpN0w6HxAoX1rA==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.8.3",
+        "@babel/generator": "^7.8.3",
+        "@babel/helpers": "^7.8.3",
+        "@babel/parser": "^7.8.3",
+        "@babel/template": "^7.8.3",
+        "@babel/traverse": "^7.8.3",
+        "@babel/types": "^7.8.3",
+        "convert-source-map": "^1.7.0",
+        "debug": "^4.1.0",
+        "gensync": "^1.0.0-beta.1",
+        "json5": "^2.1.0",
+        "lodash": "^4.17.13",
+        "resolve": "^1.3.2",
+        "semver": "^5.4.1",
+        "source-map": "^0.5.0"
+      },
+      "dependencies": {
+        "@babel/code-frame": {
+          "version": "7.8.3",
+          "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
+          "integrity": "sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0jhss4cPP93EW7s+uC5bikET2twEF3KV+7rDblJcmNvTR7VJejqd2C2g==",
+          "dev": true,
+          "requires": {
+            "@babel/highlight": "^7.8.3"
+          }
+        },
+        "@babel/highlight": {
+          "version": "7.8.3",
+          "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.8.3.tgz",
+          "integrity": "sha512-PX4y5xQUvy0fnEVHrYOarRPXVWafSjTW9T0Hab8gVIawpl2Sj0ORyrygANq+KjcNlSSTw0YCLSNA8OyZ1I4yEg==",
+          "dev": true,
+          "requires": {
+            "chalk": "^2.0.0",
+            "esutils": "^2.0.2",
+            "js-tokens": "^4.0.0"
+          }
+        },
+        "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"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
+        },
+        "convert-source-map": {
+          "version": "1.7.0",
+          "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.7.0.tgz",
+          "integrity": "sha512-4FJkXzKXEDB1snCFZlLP4gpC3JILicCpGbzG9f9G7tGqGCzETQ2hWPrcinA9oU4wtf2biUaEH5065UnMeR33oA==",
+          "dev": true,
+          "requires": {
+            "safe-buffer": "~5.1.1"
+          }
+        },
+        "debug": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.1.1.tgz",
+          "integrity": "sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==",
+          "dev": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        },
+        "js-tokens": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
+          "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==",
+          "dev": true
+        },
+        "json5": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/json5/-/json5-2.1.1.tgz",
+          "integrity": "sha512-l+3HXD0GEI3huGq1njuqtzYK8OYJyXMkOLtQ53pjWh89tvWS2h6l+1zMkYWqlb57+SiQodKZyvMEFb2X+KrFhQ==",
+          "dev": true,
+          "requires": {
+            "minimist": "^1.2.0"
+          }
+        },
+        "minimist": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
+          "dev": true
+        },
+        "safe-buffer": {
+          "version": "5.1.2",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+          "dev": true
+        },
+        "source-map": {
+          "version": "0.5.7",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
+          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=",
+          "dev": true
+        },
+        "supports-color": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        }
+      }
+    },
     "@babel/generator": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.5.5.tgz",
-      "integrity": "sha512-ETI/4vyTSxTzGnU2c49XHv2zhExkv9JHLTwDAFz85kmcwuShvYG2H08FwgIguQf4JC75CBnXAUM5PqeF4fj0nQ==",
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.8.3.tgz",
+      "integrity": "sha512-WjoPk8hRpDRqqzRpvaR8/gDUPkrnOOeuT2m8cNICJtZH6mwaCo3v0OKMI7Y6SM1pBtyijnLtAL0HDi41pf41ug==",
       "dev": true,
       "requires": {
-        "@babel/types": "^7.5.5",
+        "@babel/types": "^7.8.3",
         "jsesc": "^2.5.1",
         "lodash": "^4.17.13",
-        "source-map": "^0.5.0",
-        "trim-right": "^1.0.1"
+        "source-map": "^0.5.0"
       },
       "dependencies": {
         "jsesc": {
@@ -41,32 +165,43 @@
       }
     },
     "@babel/helper-function-name": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.1.0.tgz",
-      "integrity": "sha512-A95XEoCpb3TO+KZzJ4S/5uW5fNe26DjBGqf1o9ucyLyCmi1dXq/B3c8iaWTfBk3VvetUxl16e8tIrd5teOCfGw==",
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.8.3.tgz",
+      "integrity": "sha512-BCxgX1BC2hD/oBlIFUgOCQDOPV8nSINxCwM3o93xP4P9Fq6aV5sgv2cOOITDMtCfQ+3PvHp3l689XZvAM9QyOA==",
       "dev": true,
       "requires": {
-        "@babel/helper-get-function-arity": "^7.0.0",
-        "@babel/template": "^7.1.0",
-        "@babel/types": "^7.0.0"
+        "@babel/helper-get-function-arity": "^7.8.3",
+        "@babel/template": "^7.8.3",
+        "@babel/types": "^7.8.3"
       }
     },
     "@babel/helper-get-function-arity": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@babel/helper-get-function-arity/-/helper-get-function-arity-7.0.0.tgz",
-      "integrity": "sha512-r2DbJeg4svYvt3HOS74U4eWKsUAMRH01Z1ds1zx8KNTPtpTL5JAsdFv8BNyOpVqdFhHkkRDIg5B4AsxmkjAlmQ==",
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-get-function-arity/-/helper-get-function-arity-7.8.3.tgz",
+      "integrity": "sha512-FVDR+Gd9iLjUMY1fzE2SR0IuaJToR4RkCDARVfsBBPSP53GEqSFjD8gNyxg246VUyc/ALRxFaAK8rVG7UT7xRA==",
       "dev": true,
       "requires": {
-        "@babel/types": "^7.0.0"
+        "@babel/types": "^7.8.3"
       }
     },
     "@babel/helper-split-export-declaration": {
-      "version": "7.4.4",
-      "resolved": "https://registry.npmjs.org/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.4.4.tgz",
-      "integrity": "sha512-Ro/XkzLf3JFITkW6b+hNxzZ1n5OQ80NvIUdmHspih1XAhtN3vPTuUFT4eQnela+2MaZ5ulH+iyP513KJrxbN7Q==",
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.8.3.tgz",
+      "integrity": "sha512-3x3yOeyBhW851hroze7ElzdkeRXQYQbFIb7gLK1WQYsw2GWDay5gAJNw1sWJ0VFP6z5J1whqeXH/WCdCjZv6dA==",
+      "dev": true,
+      "requires": {
+        "@babel/types": "^7.8.3"
+      }
+    },
+    "@babel/helpers": {
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.8.3.tgz",
+      "integrity": "sha512-LmU3q9Pah/XyZU89QvBgGt+BCsTPoQa+73RxAQh8fb8qkDyIfeQnmgs+hvzhTCKTzqOyk7JTkS3MS1S8Mq5yrQ==",
       "dev": true,
       "requires": {
-        "@babel/types": "^7.4.4"
+        "@babel/template": "^7.8.3",
+        "@babel/traverse": "^7.8.3",
+        "@babel/types": "^7.8.3"
       }
     },
     "@babel/highlight": {
@@ -118,9 +253,9 @@
       }
     },
     "@babel/parser": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.5.5.tgz",
-      "integrity": "sha512-E5BN68cqR7dhKan1SfqgPGhQ178bkVKpXTPEXnFJBrEt8/DKRZlybmy+IgYLTeN7tp1R5Ccmbm2rBk17sHYU3g==",
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.8.3.tgz",
+      "integrity": "sha512-/V72F4Yp/qmHaTALizEm9Gf2eQHV3QyTL3K0cNfijwnMnb1L+LDlAubb/ZnSdGAVzVSWakujHYs1I26x66sMeQ==",
       "dev": true
     },
     "@babel/runtime": {
@@ -141,33 +276,130 @@
       }
     },
     "@babel/template": {
-      "version": "7.4.4",
-      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.4.4.tgz",
-      "integrity": "sha512-CiGzLN9KgAvgZsnivND7rkA+AeJ9JB0ciPOD4U59GKbQP2iQl+olF1l76kJOupqidozfZ32ghwBEJDhnk9MEcw==",
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.8.3.tgz",
+      "integrity": "sha512-04m87AcQgAFdvuoyiQ2kgELr2tV8B4fP/xJAVUL3Yb3bkNdMedD3d0rlSQr3PegP0cms3eHjl1F7PWlvWbU8FQ==",
       "dev": true,
       "requires": {
-        "@babel/code-frame": "^7.0.0",
-        "@babel/parser": "^7.4.4",
-        "@babel/types": "^7.4.4"
+        "@babel/code-frame": "^7.8.3",
+        "@babel/parser": "^7.8.3",
+        "@babel/types": "^7.8.3"
+      },
+      "dependencies": {
+        "@babel/code-frame": {
+          "version": "7.8.3",
+          "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
+          "integrity": "sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0jhss4cPP93EW7s+uC5bikET2twEF3KV+7rDblJcmNvTR7VJejqd2C2g==",
+          "dev": true,
+          "requires": {
+            "@babel/highlight": "^7.8.3"
+          }
+        },
+        "@babel/highlight": {
+          "version": "7.8.3",
+          "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.8.3.tgz",
+          "integrity": "sha512-PX4y5xQUvy0fnEVHrYOarRPXVWafSjTW9T0Hab8gVIawpl2Sj0ORyrygANq+KjcNlSSTw0YCLSNA8OyZ1I4yEg==",
+          "dev": true,
+          "requires": {
+            "chalk": "^2.0.0",
+            "esutils": "^2.0.2",
+            "js-tokens": "^4.0.0"
+          }
+        },
+        "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"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
+        },
+        "js-tokens": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
+          "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==",
+          "dev": true
+        },
+        "supports-color": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        }
       }
     },
     "@babel/traverse": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.5.5.tgz",
-      "integrity": "sha512-MqB0782whsfffYfSjH4TM+LMjrJnhCNEDMDIjeTpl+ASaUvxcjoiVCo/sM1GhS1pHOXYfWVCYneLjMckuUxDaQ==",
+      "version": "7.8.3",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.8.3.tgz",
+      "integrity": "sha512-we+a2lti+eEImHmEXp7bM9cTxGzxPmBiVJlLVD+FuuQMeeO7RaDbutbgeheDkw+Xe3mCfJHnGOWLswT74m2IPg==",
       "dev": true,
       "requires": {
-        "@babel/code-frame": "^7.5.5",
-        "@babel/generator": "^7.5.5",
-        "@babel/helper-function-name": "^7.1.0",
-        "@babel/helper-split-export-declaration": "^7.4.4",
-        "@babel/parser": "^7.5.5",
-        "@babel/types": "^7.5.5",
+        "@babel/code-frame": "^7.8.3",
+        "@babel/generator": "^7.8.3",
+        "@babel/helper-function-name": "^7.8.3",
+        "@babel/helper-split-export-declaration": "^7.8.3",
+        "@babel/parser": "^7.8.3",
+        "@babel/types": "^7.8.3",
         "debug": "^4.1.0",
         "globals": "^11.1.0",
         "lodash": "^4.17.13"
       },
       "dependencies": {
+        "@babel/code-frame": {
+          "version": "7.8.3",
+          "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
+          "integrity": "sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0jhss4cPP93EW7s+uC5bikET2twEF3KV+7rDblJcmNvTR7VJejqd2C2g==",
+          "dev": true,
+          "requires": {
+            "@babel/highlight": "^7.8.3"
+          }
+        },
+        "@babel/highlight": {
+          "version": "7.8.3",
+          "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.8.3.tgz",
+          "integrity": "sha512-PX4y5xQUvy0fnEVHrYOarRPXVWafSjTW9T0Hab8gVIawpl2Sj0ORyrygANq+KjcNlSSTw0YCLSNA8OyZ1I4yEg==",
+          "dev": true,
+          "requires": {
+            "chalk": "^2.0.0",
+            "esutils": "^2.0.2",
+            "js-tokens": "^4.0.0"
+          }
+        },
+        "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"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
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-          "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=",
-          "dev": true
-        }
+        "@istanbuljs/schema": "^0.1.2",
+        "glob": "^7.1.4",
+        "minimatch": "^3.0.4"
       }
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@@ -11976,26 +12407,6 @@
       "resolved": "https://registry.npmjs.org/typewiselite/-/typewiselite-1.0.0.tgz",
       "integrity": "sha1-yIgvobsQksBgBal/NO9chQjjZk4="
     },
-    "uglify-js": {
-      "version": "3.6.0",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.0.tgz",
-      "integrity": "sha512-W+jrUHJr3DXKhrsS7NUVxn3zqMOFn0hL/Ei6v0anCIMoKC93TjcflTagwIHLW7SfMFfiQuktQyFVCFHGUE0+yg==",
-      "dev": true,
-      "optional": true,
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-        "commander": "~2.20.0",
-        "source-map": "~0.6.1"
-      },
-      "dependencies": {
-        "commander": {
-          "version": "2.20.0",
-          "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.0.tgz",
-          "integrity": "sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==",
-          "dev": true,
-          "optional": true
-        }
-      }
-    },
     "uglifyjs-webpack-plugin": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/uglifyjs-webpack-plugin/-/uglifyjs-webpack-plugin-1.3.0.tgz",
@@ -12891,12 +13302,13 @@
           "resolved": "https://registry.npmjs.org/eth-sig-util/-/eth-sig-util-1.4.2.tgz",
           "integrity": "sha1-jZWCAsftuq6Dlwf7pvCf8ydgYhA=",
           "requires": {
+            "ethereumjs-abi": "git+https://github.com/ethereumjs/ethereumjs-abi.git",
             "ethereumjs-util": "^5.1.1"
           },
           "dependencies": {
             "ethereumjs-abi": {
               "version": "git+https://github.com/ethereumjs/ethereumjs-abi.git#1cfbb13862f90f0b391d8a699544d5fe4dfb8c7b",
-              "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git#1cfbb13862f90f0b391d8a699544d5fe4dfb8c7b",
+              "from": "git+https://github.com/ethereumjs/ethereumjs-abi.git",
               "requires": {
                 "bn.js": "^4.11.8",
                 "ethereumjs-util": "^6.0.0"
@@ -12927,6 +13339,13 @@
                 "inherits": "^2.0.4",
                 "nan": "^2.14.0",
                 "safe-buffer": "^5.2.0"
+              },
+              "dependencies": {
+                "nan": {
+                  "version": "2.14.0",
+                  "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.0.tgz",
+                  "integrity": "sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg=="
+                }
               }
             }
           }
@@ -13074,11 +13493,6 @@
             }
           }
         },
-        "nan": {
-          "version": "2.14.0",
-          "resolved": "https://registry.npmjs.org/nan/-/nan-2.14.0.tgz",
-          "integrity": "sha512-INOFj37C7k3AfaNTtX8RhsTw7qRy7eLET14cROi9+5HAVbbHuIWUHEauBv5qT4Av2tWasiTY1Jw6puUNqRJXQg=="
-        },
         "ws": {
           "version": "5.2.2",
           "resolved": "https://registry.npmjs.org/ws/-/ws-5.2.2.tgz",
@@ -13544,14 +13958,15 @@
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     },
     "write-file-atomic": {
-      "version": "2.4.3",
-      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.3.tgz",
-      "integrity": "sha512-GaETH5wwsX+GcnzhPgKcKjJ6M2Cq3/iZp1WyY/X1CSqrW+jVNM9Y7D8EC2sM4ZG/V8wZlSniJnCKWPmBYAucRQ==",
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.1.tgz",
+      "integrity": "sha512-JPStrIyyVJ6oCSz/691fAjFtefZ6q+fP6tm+OS4Qw6o+TGQxNp1ziY2PgS+X/m0V8OWhZiO/m4xSj+Pr4RrZvw==",
       "dev": true,
       "requires": {
-        "graceful-fs": "^4.1.11",
         "imurmurhash": "^0.1.4",
-        "signal-exit": "^3.0.2"
+        "is-typedarray": "^1.0.0",
+        "signal-exit": "^3.0.2",
+        "typedarray-to-buffer": "^3.1.5"
       }
     },
     "ws": {
diff --git a/package.json b/package.json
index 060ae2e2be..a851766caf 100644
--- a/package.json
+++ b/package.json
@@ -71,7 +71,7 @@
     "mocha": "5.2.0",
     "mocha-lcov-reporter": "^1.3.0",
     "number-to-bn": "1.7.0",
-    "nyc": "^14.1.1",
+    "nyc": "^15.0.0",
     "pify": "4.0.0",
     "portfinder": "^1.0.18",
     "prettier": "^1.18.2",
diff --git a/perf/transactions.js b/perf/transactions.js
index faa9376947..197c74b33b 100755
--- a/perf/transactions.js
+++ b/perf/transactions.js
@@ -36,7 +36,6 @@ function runAverage(title, numberOfRuns, fnTimes, fn, callback) {
         }
         results[n] = totalTime;
 
-        console.log(totalTime / 1000 + " seconds");
         next();
       });
     },
@@ -51,8 +50,6 @@ function runAverage(title, numberOfRuns, fnTimes, fn, callback) {
 
       var average = sum / numberOfRuns;
 
-      console.log("Average " + average / 1000 + " seconds");
-
       callback(null, average);
     }
   );
diff --git a/test/block-tags.js b/test/block-tags.js
index 2edfeb8c96..309e699547 100644
--- a/test/block-tags.js
+++ b/test/block-tags.js
@@ -9,14 +9,19 @@ describe("Block Tags", function() {
   before("Setting up web3", async function() {
     this.timeout(10000);
 
+    const date = new Date(0);
     const options = {
       mnemonic: "candy maple velvet cake sugar cream honey rich smooth crumble sweet treat",
-      time: new Date(0) // Testing features that rely on determinate conditions
+      time: date // Testing features that rely on determinate conditions
     };
 
     context = await initializeTestProvider(options);
   });
 
+  before("Stop automatic miner", async function() {
+    await context.send("miner_stop");
+  });
+
   before("Get initial balance, nonce and block number", async function() {
     const { accounts, web3 } = context;
 
@@ -38,11 +43,15 @@ describe("Block Tags", function() {
   before("Make a transaction that changes the balance, code and nonce", async function() {
     const { accounts, web3 } = context;
     const { result } = compile("./test/contracts/examples/", "Example");
-    const { contractAddress } = await web3.eth.sendTransaction({
+    const contractPromise = web3.eth.sendTransaction({
       from: accounts[0],
       data: "0x" + result.contracts["Example.sol"].Example.evm.bytecode.object,
       gas: 3141592
     });
+    contractPromise.on("transactionHash", () => {
+      context.send("evm_mine", 1);
+    });
+    const { contractAddress } = await contractPromise;
 
     initialState.contractAddress = contractAddress;
   });
diff --git a/test/gas/gas.js b/test/gas/gas.js
index f474dc7288..ec51788d29 100644
--- a/test/gas/gas.js
+++ b/test/gas/gas.js
@@ -615,8 +615,6 @@ describe("Gas", function() {
 
           // prime storage by making sure it is set to 0
           await instance.methods.reset().send({ from: accounts[0], gas: 5000000 });
-          const method = instance.methods.triggerAllRefunds();
-          const gasEstimate = await method.estimateGas({ from: accounts[0] });
 
           const hashes = await Promise.all(
             transactions.map((transaction) => {
@@ -636,6 +634,9 @@ describe("Gas", function() {
           const currentBlockNumber = await web3.eth.getBlockNumber();
           assert.deepStrictEqual(currentBlockNumber, 2, "Current Block Should be 2");
 
+          const method = instance.methods.triggerAllRefunds();
+          const gasEstimate = await method.estimateGas({ from: accounts[0] });
+
           const { gasUsed } = await method.send({ from: accounts[0], gas: gasEstimate });
 
           let transactionCostMinusRefund = gasEstimate - RSELFDESTRUCT_REFUND - RSCLEAR_REFUND;