diff --git a/Pipfile b/Pipfile
index 1312960b..fef290df 100644
--- a/Pipfile
+++ b/Pipfile
@@ -29,6 +29,7 @@ black = "*"
 pytest-watch = "*"
 factory-boy = "*"
 pytest-flask = "*"
+pytest-env = "*"
 
 [requires]
 python_version = "3.6"
diff --git a/Pipfile.lock b/Pipfile.lock
index 707a6ec2..8a19a1a2 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "5fc8273838354406366b401529a6f512a73ac6a8ecea6699afa4ab7b4996bf13"
+            "sha256": "41ad134816dae388385cfb15105e0eca436b25791ec4fbf67a2b36c4ae8056bd"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -271,7 +271,7 @@
                 "sha256:1d936da41ee06216d89fdc7ead1ee9a5da2811a8787515a976b646e110c3f622",
                 "sha256:e4ef42e82b0b493c5849eed98b5ab49d6767caf982127e9a33167f1153b36cc5"
             ],
-            "markers": "python_version != '3.0.*' and python_version != '3.1.*' and python_version != '3.2.*' and python_version >= '2.7' and python_version != '3.3.*'",
+            "markers": "python_version != '3.0.*' and python_version != '3.2.*' and python_version >= '2.7' and python_version != '3.1.*' and python_version != '3.3.*'",
             "version": "==2018.5"
         },
         "redis": {
@@ -317,7 +317,7 @@
                 "sha256:a68ac5e15e76e7e5dd2b8f94007233e01effe3e50e8daddf69acfd81cb686baf",
                 "sha256:b5725a0bd4ba422ab0e66e89e030c806576753ea3ee08554382c14e685d117b5"
             ],
-            "markers": "python_version >= '2.6' and python_version != '3.1.*' and python_version != '3.0.*' and python_version != '3.2.*' and python_version != '3.3.*' and python_version < '4'",
+            "markers": "python_version >= '2.6' and python_version != '3.2.*' and python_version != '3.0.*' and python_version < '4' and python_version != '3.1.*' and python_version != '3.3.*'",
             "version": "==1.23"
         },
         "webassets": {
@@ -350,14 +350,6 @@
             ],
             "version": "==1.4.3"
         },
-        "appnope": {
-            "hashes": [
-                "sha256:5b26757dc6f79a3b7dc9fab95359328d5747fcb2409d331ea66d0272b90ab2a0",
-                "sha256:8b995ffe925347a2138d7ac0fe77155e4311a0ea6d6da4f5128fe4b3cbe5ed71"
-            ],
-            "markers": "sys_platform == 'darwin'",
-            "version": "==0.1.0"
-        },
         "argh": {
             "hashes": [
                 "sha256:a9b3aaa1904eeb78e32394cd46c6f37ac0fb4af6dc488daa58971bdc7d7fcaf3",
@@ -449,6 +441,7 @@
                 "sha256:ea7cfd3aeb1544732d08bd9cfba40c5b78e3a91e17b1a0698ab81bfc5554c628",
                 "sha256:f6d67f04abfb2b4bea7afc7fa6c18cf4c523a67956e455668be9ae42bccc21ad"
             ],
+            "markers": "python_version != '3.2.*' and python_version != '3.0.*' and python_version != '3.1.*' and python_version >= '2.7'",
             "version": "==0.9.0"
         },
         "flask": {
@@ -501,7 +494,7 @@
                 "sha256:b9c40e9750f3d77e6e4d441d8b0266cf555e7cdabdcff33c4fd06366ca761ef8",
                 "sha256:ec9ef8f4a9bc6f71eec99e1806bfa2de401650d996c59330782b89a5555c1497"
             ],
-            "markers": "python_version != '3.3.*' and python_version >= '2.7' and python_version != '3.1.*' and python_version != '3.0.*' and python_version != '3.2.*'",
+            "markers": "python_version >= '2.7' and python_version != '3.2.*' and python_version != '3.1.*' and python_version != '3.0.*' and python_version != '3.3.*'",
             "version": "==4.3.4"
         },
         "itsdangerous": {
@@ -619,7 +612,7 @@
                 "sha256:6e3836e39f4d36ae72840833db137f7b7d35105079aee6ec4a62d9f80d594dd1",
                 "sha256:95eb8364a4708392bae89035f45341871286a333f749c3141c20573d2b3876e1"
             ],
-            "markers": "python_version != '3.3.*' and python_version >= '2.7' and python_version != '3.1.*' and python_version != '3.0.*' and python_version != '3.2.*'",
+            "markers": "python_version >= '2.7' and python_version != '3.2.*' and python_version != '3.1.*' and python_version != '3.0.*' and python_version != '3.3.*'",
             "version": "==0.7.1"
         },
         "prompt-toolkit": {
@@ -642,7 +635,7 @@
                 "sha256:3fd59af7435864e1a243790d322d763925431213b6b8529c6ca71081ace3bbf7",
                 "sha256:e31fb2767eb657cbde86c454f02e99cb846d3cd9d61b318525140214fdc0e98e"
             ],
-            "markers": "python_version != '3.3.*' and python_version >= '2.7' and python_version != '3.1.*' and python_version != '3.0.*' and python_version != '3.2.*'",
+            "markers": "python_version >= '2.7' and python_version != '3.2.*' and python_version != '3.1.*' and python_version != '3.0.*' and python_version != '3.3.*'",
             "version": "==1.5.4"
         },
         "pygments": {
@@ -668,6 +661,13 @@
             "index": "pypi",
             "version": "==3.7.2"
         },
+        "pytest-env": {
+            "hashes": [
+                "sha256:7e94956aef7f2764f3c147d216ce066bf6c42948bb9e293169b1b1c880a580c2"
+            ],
+            "index": "pypi",
+            "version": "==0.6.2"
+        },
         "pytest-flask": {
             "hashes": [
                 "sha256:2c5a36f9033ef8b6f85ddbefaebdd4f89197fc283f94b20dfe1a1beba4b77f03",
@@ -747,43 +747,6 @@
             ],
             "version": "==4.3.2"
         },
-        "typed-ast": {
-            "hashes": [
-                "sha256:0948004fa228ae071054f5208840a1e88747a357ec1101c17217bfe99b299d58",
-                "sha256:10703d3cec8dcd9eef5a630a04056bbc898abc19bac5691612acba7d1325b66d",
-                "sha256:1f6c4bd0bdc0f14246fd41262df7dfc018d65bb05f6e16390b7ea26ca454a291",
-                "sha256:25d8feefe27eb0303b73545416b13d108c6067b846b543738a25ff304824ed9a",
-                "sha256:29464a177d56e4e055b5f7b629935af7f49c196be47528cc94e0a7bf83fbc2b9",
-                "sha256:2e214b72168ea0275efd6c884b114ab42e316de3ffa125b267e732ed2abda892",
-                "sha256:3e0d5e48e3a23e9a4d1a9f698e32a542a4a288c871d33ed8df1b092a40f3a0f9",
-                "sha256:519425deca5c2b2bdac49f77b2c5625781abbaf9a809d727d3a5596b30bb4ded",
-                "sha256:57fe287f0cdd9ceaf69e7b71a2e94a24b5d268b35df251a88fef5cc241bf73aa",
-                "sha256:668d0cec391d9aed1c6a388b0d5b97cd22e6073eaa5fbaa6d2946603b4871efe",
-                "sha256:68ba70684990f59497680ff90d18e756a47bf4863c604098f10de9716b2c0bdd",
-                "sha256:6de012d2b166fe7a4cdf505eee3aaa12192f7ba365beeefaca4ec10e31241a85",
-                "sha256:79b91ebe5a28d349b6d0d323023350133e927b4de5b651a8aa2db69c761420c6",
-                "sha256:8550177fa5d4c1f09b5e5f524411c44633c80ec69b24e0e98906dd761941ca46",
-                "sha256:898f818399cafcdb93cbbe15fc83a33d05f18e29fb498ddc09b0214cdfc7cd51",
-                "sha256:94b091dc0f19291adcb279a108f5d38de2430411068b219f41b343c03b28fb1f",
-                "sha256:a26863198902cda15ab4503991e8cf1ca874219e0118cbf07c126bce7c4db129",
-                "sha256:a8034021801bc0440f2e027c354b4eafd95891b573e12ff0418dec385c76785c",
-                "sha256:bc978ac17468fe868ee589c795d06777f75496b1ed576d308002c8a5756fb9ea",
-                "sha256:c05b41bc1deade9f90ddc5d988fe506208019ebba9f2578c622516fd201f5863",
-                "sha256:c9b060bd1e5a26ab6e8267fd46fc9e02b54eb15fffb16d112d4c7b1c12987559",
-                "sha256:edb04bdd45bfd76c8292c4d9654568efaedf76fe78eb246dde69bdb13b2dad87",
-                "sha256:f19f2a4f547505fe9072e15f6f4ae714af51b5a681a97f187971f50c283193b6"
-            ],
-            "markers": "python_version < '3.7' and implementation_name == 'cpython'",
-            "version": "==1.1.0"
-        },
-        "typing": {
-            "hashes": [
-                "sha256:3a887b021a77b292e151afb75323dea88a7bc1b3dfa92176cff8e44c8b68bddf",
-                "sha256:b2c689d54e1144bbcfd191b0832980a21c2dbcf7b5ff7a66248a60c90e951eb8",
-                "sha256:d400a9344254803a2368533e4533a4200d21eb7b6b729c173bc38201a74db3f2"
-            ],
-            "version": "==3.6.4"
-        },
         "watchdog": {
             "hashes": [
                 "sha256:7e65882adb7746039b6f3876ee174952f8eaaa34491ba34333ddf1fe35de4162"