diff --git a/.gitignore b/.gitignore
index bba1005d8..cbf795afb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 *.exe
 *.dll
 .data
+!/tests/cogs/dataconverter/data/**/*.json
 
 ### JetBrains template
 # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
diff --git a/redbot/cogs/dataconverter/core_specs.py b/redbot/cogs/dataconverter/core_specs.py
index 307466505..08cc2ce57 100644
--- a/redbot/cogs/dataconverter/core_specs.py
+++ b/redbot/cogs/dataconverter/core_specs.py
@@ -119,11 +119,10 @@ class SpecResolver(object):
     def past_nicknames_conv_spec(self, data: dict):
         flatscoped = self.apply_scope(Config.MEMBER, self.flatten_dict(data))
         ret = {}
-        for k, v in flatscoped.items():
-            outerkey, innerkey = (*k[:-1],), (k[-1],)
-            if outerkey not in ret:
-                ret[outerkey] = {}
-            ret[outerkey].update({innerkey: v})
+        for config_identifiers, v2data in flatscoped.items():
+            if config_identifiers not in ret:
+                ret[config_identifiers] = {}
+            ret[config_identifiers].update({("past_nicks",): v2data})
         return ret
 
     def customcom_conv_spec(self, data: dict):
@@ -144,18 +143,28 @@ class SpecResolver(object):
             ret[outerkey].update({innerkey: ccinfo})
         return ret
 
-    async def convert(self, bot: Red, prettyname: str):
-        if prettyname not in self.available:
-            raise NotImplementedError("No Conversion Specs for this")
-
-        info = self.available_core_conversions[prettyname]
-        filepath, converter = info["file"], info["converter"]
-        (cogname, attr, _id) = info["cfg"]
+    def get_config_object(self, bot, cogname, attr, _id):
         try:
             config = getattr(bot.get_cog(cogname), attr)
         except (TypeError, AttributeError):
             config = Config.get_conf(None, _id, cog_name=cogname)
 
+        return config
+
+    def get_conversion_info(self, prettyname: str):
+        info = self.available_core_conversions[prettyname]
+        filepath, converter = info["file"], info["converter"]
+        (cogname, attr, _id) = info["cfg"]
+        return filepath, converter, cogname, attr, _id
+
+    async def convert(self, bot: Red, prettyname: str, config=None):
+        if prettyname not in self.available:
+            raise NotImplementedError("No Conversion Specs for this")
+
+        filepath, converter, cogname, attr, _id = self.get_conversion_info(prettyname)
+        if config is None:
+            config = self.get_config_object(bot, cogname, attr, _id)
+
         try:
             items = converter(dc.json_load(filepath))
             await dc(config).dict_import(items)
diff --git a/tests/cogs/dataconverter/__init__.py b/tests/cogs/dataconverter/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/cogs/dataconverter/data/mod/past_nicknames.json b/tests/cogs/dataconverter/data/mod/past_nicknames.json
new file mode 100644
index 000000000..f44b2c0d6
--- /dev/null
+++ b/tests/cogs/dataconverter/data/mod/past_nicknames.json
@@ -0,0 +1,26 @@
+{
+    "1" : {
+        "1" : [
+            "Test",
+            "Test2",
+            "TEST3"
+        ],
+        "2" : [
+            "Test4",
+            "Test5",
+            "TEST6"
+        ]
+    },
+    "2" : {
+        "1" : [
+            "Test",
+            "Test2",
+            "TEST3"
+        ],
+        "2" : [
+            "Test4",
+            "Test5",
+            "TEST6"
+        ]
+    }
+}
\ No newline at end of file
diff --git a/tests/cogs/dataconverter/test_dataconverter.py b/tests/cogs/dataconverter/test_dataconverter.py
new file mode 100644
index 000000000..59f04068a
--- /dev/null
+++ b/tests/cogs/dataconverter/test_dataconverter.py
@@ -0,0 +1,39 @@
+import pytest
+from pathlib import Path
+from collections import namedtuple
+
+from redbot.cogs.dataconverter import core_specs
+from redbot.core.utils.data_converter import DataConverter
+
+
+def mock_dpy_object(id_):
+    return namedtuple("DPYObject", "id")(int(id_))
+
+
+def mock_dpy_member(guildid, userid):
+    return namedtuple("Member", "id guild")(int(userid), mock_dpy_object(guildid))
+
+
+@pytest.fixture()
+def specresolver():
+    here = Path(__file__)
+
+    resolver = core_specs.SpecResolver(here.parent)
+    return resolver
+
+
+@pytest.mark.asyncio
+async def test_mod_nicknames(red, specresolver: core_specs.SpecResolver):
+    filepath, converter, cogname, attr, _id = specresolver.get_conversion_info("Past Nicknames")
+    conf = specresolver.get_config_object(red, cogname, attr, _id)
+
+    v2data = DataConverter.json_load(filepath)
+
+    await specresolver.convert(red, "Past Nicknames", config=conf)
+
+    for guildid, guild_data in v2data.items():
+        guild = mock_dpy_object(guildid)
+        for userid, user_data in guild_data.items():
+            member = mock_dpy_member(guildid, userid)
+
+            assert await conf.member(member).past_nicks() == user_data
diff --git a/tests/cogs/test_alias.py b/tests/cogs/test_alias.py
index 1c54d67f5..92f55bfbf 100644
--- a/tests/cogs/test_alias.py
+++ b/tests/cogs/test_alias.py
@@ -1,15 +1,14 @@
 import pytest
 
 from redbot.cogs.alias import Alias
+from redbot.core import Config
 
 
 @pytest.fixture()
-def alias(config):
-    import redbot.cogs.alias.alias
-
-    redbot.cogs.alias.alias.Config.get_conf = lambda *args, **kwargs: config
-
-    return Alias(None)
+def alias(config, monkeypatch):
+    with monkeypatch.context() as m:
+        m.setattr(Config, "get_conf", lambda *args, **kwargs: config)
+        return Alias(None)
 
 
 def test_is_valid_alias_name(alias):
diff --git a/tests/cogs/test_economy.py b/tests/cogs/test_economy.py
index 4d9b10993..9ecdacb2f 100644
--- a/tests/cogs/test_economy.py
+++ b/tests/cogs/test_economy.py
@@ -2,15 +2,15 @@ import pytest
 
 
 @pytest.fixture()
-def bank(config):
+def bank(config, monkeypatch):
     from redbot.core import Config
 
-    Config.get_conf = lambda *args, **kwargs: config
+    with monkeypatch.context() as m:
+        m.setattr(Config, "get_conf", lambda *args, **kwargs: config)
+        from redbot.core import bank
 
-    from redbot.core import bank
-
-    bank._register_defaults()
-    return bank
+        bank._register_defaults()
+        return bank
 
 
 @pytest.mark.asyncio
diff --git a/tests/cogs/test_mod.py b/tests/cogs/test_mod.py
index fbe830dc1..7409b9916 100644
--- a/tests/cogs/test_mod.py
+++ b/tests/cogs/test_mod.py
@@ -2,15 +2,15 @@ import pytest
 
 
 @pytest.fixture
-def mod(config):
+def mod(config, monkeypatch):
     from redbot.core import Config
 
-    Config.get_conf = lambda *args, **kwargs: config
+    with monkeypatch.context() as m:
+        m.setattr(Config, "get_conf", lambda *args, **kwargs: config)
+        from redbot.core import modlog
 
-    from redbot.core import modlog
-
-    modlog._register_defaults()
-    return modlog
+        modlog._register_defaults()
+        return modlog
 
 
 @pytest.mark.asyncio