diff --git a/plugins/hls-brittany-plugin/hls-brittany-plugin.cabal b/plugins/hls-brittany-plugin/hls-brittany-plugin.cabal
index a29291593e9..1e919c43821 100644
--- a/plugins/hls-brittany-plugin/hls-brittany-plugin.cabal
+++ b/plugins/hls-brittany-plugin/hls-brittany-plugin.cabal
@@ -28,3 +28,42 @@ library
                ,    transformers
 
   default-language: Haskell2010
+
+executable test-server
+  default-language:   Haskell2010
+  build-depends:
+    , base
+    , data-default
+    , ghcide
+    , hls-brittany-plugin
+    , hls-plugin-api
+    , shake
+  main-is: Server.hs
+  hs-source-dirs: test
+  ghc-options: -threaded
+
+test-suite tests
+  type:               exitcode-stdio-1.0
+  default-language:   Haskell2010
+  build-tool-depends:
+    hls-brittany-plugin:test-server -any,
+  hs-source-dirs: test
+  main-is: Main.hs
+  build-depends:
+    , aeson
+    , base
+    , bytestring
+    , data-default
+    , deepseq
+    , ghcide                >= 0.7.5.0
+    , hls-brittany-plugin
+    , hspec-expectations
+    , megaparsec
+    , lens
+    , lsp-test
+    , tasty
+    , tasty-ant-xml           >=1.1.6
+    , tasty-hunit
+    , tasty-golden
+    , tasty-rerun
+    , text
diff --git a/plugins/hls-brittany-plugin/test/Main.hs b/plugins/hls-brittany-plugin/test/Main.hs
new file mode 100644
index 00000000000..1065db972dc
--- /dev/null
+++ b/plugins/hls-brittany-plugin/test/Main.hs
@@ -0,0 +1,54 @@
+{-# LANGUAGE OverloadedStrings #-}
+module Main(main) where
+
+import Control.Monad.IO.Class
+import Data.Aeson
+import qualified Data.ByteString.Lazy as BS
+import qualified Data.Text.Encoding as T
+import qualified Data.Text.IO as T
+import Language.LSP.Test
+import Language.LSP.Types
+import Test.Tasty
+import Test.Tasty.Golden
+import Test.Tasty.HUnit
+import Test.Tasty.Runners (
+    consoleTestReporter,
+    listingTests,
+ )
+import Test.Tasty.Ingredients.Rerun
+import Test.Tasty.Runners.AntXML
+
+main :: IO ()
+main = defaultMainWithIngredients
+        [antXMLRunner, rerunningTests [listingTests, consoleTestReporter]]
+        tests
+
+testCommand = "test-server"
+
+tests :: TestTree
+tests = testGroup "brittany" [
+    goldenVsStringDiff "formats a document with LF endings" goldenGitDiff "test/testdata/BrittanyLF.formatted_document.hs" $ runSession testCommand fullCaps "test/testdata" $ do
+        doc <- openDoc "BrittanyLF.hs" "haskell"
+        formatDoc doc (FormattingOptions 4 True Nothing Nothing Nothing)
+        BS.fromStrict . T.encodeUtf8 <$> documentContents doc
+
+    , goldenVsStringDiff "formats a document with CRLF endings" goldenGitDiff "test/testdata/BrittanyCRLF.formatted_document.hs" $ runSession testCommand fullCaps "test/testdata" $ do
+        doc <- openDoc "BrittanyCRLF.hs" "haskell"
+        formatDoc doc (FormattingOptions 4 True Nothing Nothing Nothing)
+        BS.fromStrict . T.encodeUtf8 <$> documentContents doc
+
+    , goldenVsStringDiff "formats a range with LF endings" goldenGitDiff "test/testdata/BrittanyLF.formatted_range.hs" $ runSession testCommand fullCaps "test/testdata" $ do
+        doc <- openDoc "BrittanyLF.hs" "haskell"
+        let range = Range (Position 1 0) (Position 2 22)
+        formatRange doc (FormattingOptions 4 True Nothing Nothing Nothing) range
+        BS.fromStrict . T.encodeUtf8 <$> documentContents doc
+
+    , goldenVsStringDiff "formats a range with CRLF endings" goldenGitDiff "test/testdata/BrittanyCRLF.formatted_range.hs" $ runSession testCommand fullCaps "test/testdata" $ do
+        doc <- openDoc "BrittanyCRLF.hs" "haskell"
+        let range = Range (Position 1 0) (Position 2 22)
+        formatRange doc (FormattingOptions 4 True Nothing Nothing Nothing) range
+        BS.fromStrict . T.encodeUtf8 <$> documentContents doc
+    ]
+
+goldenGitDiff :: FilePath -> FilePath -> [String]
+goldenGitDiff fRef fNew = ["git", "diff", "--no-index", "--text", "--exit-code", fRef, fNew]
diff --git a/plugins/hls-brittany-plugin/test/Server.hs b/plugins/hls-brittany-plugin/test/Server.hs
new file mode 100644
index 00000000000..192103ec9cd
--- /dev/null
+++ b/plugins/hls-brittany-plugin/test/Server.hs
@@ -0,0 +1,19 @@
+{-# LANGUAGE ViewPatterns #-}
+{-# LANGUAGE OverloadedStrings #-}
+module Main(main) where
+
+import Data.Default
+import Development.IDE.Main
+import qualified Development.IDE.Plugin.HLS.GhcIde as Ghcide
+import Ide.Plugin.Config
+import Ide.Plugin.Brittany as B
+import Ide.PluginUtils
+
+main :: IO ()
+main = defaultMain def
+  { argsHlsPlugins = pluginDescToIdePlugins $
+    [ B.descriptor "brittany"
+    ] <>
+    Ghcide.descriptors
+  , argsDefaultHlsConfig = def { formattingProvider = "brittany" }
+  }
diff --git a/test/testdata/format/BrittanyCRLF.formatted_document.hs b/plugins/hls-brittany-plugin/test/testdata/BrittanyCRLF.formatted_document.hs
similarity index 100%
rename from test/testdata/format/BrittanyCRLF.formatted_document.hs
rename to plugins/hls-brittany-plugin/test/testdata/BrittanyCRLF.formatted_document.hs
diff --git a/test/testdata/format/BrittanyCRLF.formatted_range.hs b/plugins/hls-brittany-plugin/test/testdata/BrittanyCRLF.formatted_range.hs
similarity index 100%
rename from test/testdata/format/BrittanyCRLF.formatted_range.hs
rename to plugins/hls-brittany-plugin/test/testdata/BrittanyCRLF.formatted_range.hs
diff --git a/test/testdata/format/BrittanyCRLF.hs b/plugins/hls-brittany-plugin/test/testdata/BrittanyCRLF.hs
similarity index 100%
rename from test/testdata/format/BrittanyCRLF.hs
rename to plugins/hls-brittany-plugin/test/testdata/BrittanyCRLF.hs
diff --git a/test/testdata/format/BrittanyLF.formatted_document.hs b/plugins/hls-brittany-plugin/test/testdata/BrittanyLF.formatted_document.hs
similarity index 100%
rename from test/testdata/format/BrittanyLF.formatted_document.hs
rename to plugins/hls-brittany-plugin/test/testdata/BrittanyLF.formatted_document.hs
diff --git a/test/testdata/format/BrittanyLF.formatted_range.hs b/plugins/hls-brittany-plugin/test/testdata/BrittanyLF.formatted_range.hs
similarity index 100%
rename from test/testdata/format/BrittanyLF.formatted_range.hs
rename to plugins/hls-brittany-plugin/test/testdata/BrittanyLF.formatted_range.hs
diff --git a/test/testdata/format/BrittanyLF.hs b/plugins/hls-brittany-plugin/test/testdata/BrittanyLF.hs
similarity index 100%
rename from test/testdata/format/BrittanyLF.hs
rename to plugins/hls-brittany-plugin/test/testdata/BrittanyLF.hs
diff --git a/test/functional/Format.hs b/test/functional/Format.hs
index 75968373b7b..7a8b1911641 100644
--- a/test/functional/Format.hs
+++ b/test/functional/Format.hs
@@ -14,9 +14,7 @@ import Test.Tasty.Golden
 import Test.Tasty.HUnit
 import Control.Lens ((^.))
 
-#if AGPL
 import qualified Data.Text.IO as T
-#endif
 
 tests :: TestTree
 tests = testGroup "format document" [
@@ -31,9 +29,6 @@ tests = testGroup "format document" [
     , rangeTests
     , providerTests
     , stylishHaskellTests
-#if AGPL
-    , brittanyTests
-#endif
     , ormoluTests
     , fourmoluTests
     ]
@@ -110,37 +105,6 @@ stylishHaskellTests = testGroup "stylish-haskell" [
       BS.fromStrict . T.encodeUtf8 <$> documentContents doc
   ]
 
-#if AGPL
-brittanyTests :: TestTree
-brittanyTests = testGroup "brittany" [
-    goldenVsStringDiff "formats a document with LF endings" goldenGitDiff "test/testdata/format/BrittanyLF.formatted_document.hs" $ runSession hlsCommand fullCaps "test/testdata/format" $ do
-        sendNotification SWorkspaceDidChangeConfiguration (DidChangeConfigurationParams (formatLspConfig "brittany"))
-        doc <- openDoc "BrittanyLF.hs" "haskell"
-        formatDoc doc (FormattingOptions 4 True Nothing Nothing Nothing)
-        BS.fromStrict . T.encodeUtf8 <$> documentContents doc
-
-    , goldenVsStringDiff "formats a document with CRLF endings" goldenGitDiff "test/testdata/format/BrittanyCRLF.formatted_document.hs" $ runSession hlsCommand fullCaps "test/testdata/format" $ do
-        sendNotification SWorkspaceDidChangeConfiguration (DidChangeConfigurationParams (formatLspConfig "brittany"))
-        doc <- openDoc "BrittanyCRLF.hs" "haskell"
-        formatDoc doc (FormattingOptions 4 True Nothing Nothing Nothing)
-        BS.fromStrict . T.encodeUtf8 <$> documentContents doc
-
-    , goldenVsStringDiff "formats a range with LF endings" goldenGitDiff "test/testdata/format/BrittanyLF.formatted_range.hs" $ runSession hlsCommand fullCaps "test/testdata/format" $ do
-        sendNotification SWorkspaceDidChangeConfiguration (DidChangeConfigurationParams (formatLspConfig "brittany"))
-        doc <- openDoc "BrittanyLF.hs" "haskell"
-        let range = Range (Position 1 0) (Position 2 22)
-        formatRange doc (FormattingOptions 4 True Nothing Nothing Nothing) range
-        BS.fromStrict . T.encodeUtf8 <$> documentContents doc
-
-    , goldenVsStringDiff "formats a range with CRLF endings" goldenGitDiff "test/testdata/format/BrittanyCRLF.formatted_range.hs" $ runSession hlsCommand fullCaps "test/testdata/format" $ do
-        sendNotification SWorkspaceDidChangeConfiguration (DidChangeConfigurationParams (formatLspConfig "brittany"))
-        doc <- openDoc "BrittanyCRLF.hs" "haskell"
-        let range = Range (Position 1 0) (Position 2 22)
-        formatRange doc (FormattingOptions 4 True Nothing Nothing Nothing) range
-        BS.fromStrict . T.encodeUtf8 <$> documentContents doc
-    ]
-#endif
-
 ormoluTests :: TestTree
 ormoluTests = testGroup "ormolu"
   [ goldenVsStringDiff "formats correctly" goldenGitDiff "test/testdata/format/Format.ormolu.formatted.hs" $ runSession hlsCommand fullCaps "test/testdata/format" $ do
@@ -172,11 +136,9 @@ fourmoluTests = testGroup "fourmolu"
 formatLspConfig :: Value -> Value
 formatLspConfig provider = object [ "haskell" .= object ["formattingProvider" .= (provider :: Value)] ]
 
-#if AGPL
 -- | The same as 'formatLspConfig' but using the legacy section name
 formatLspConfigOld :: Value -> Value
 formatLspConfigOld provider = object [ "languageServerHaskell" .= object ["formattingProvider" .= (provider :: Value)] ]
-#endif
 
 formatConfig :: Value -> SessionConfig
 formatConfig provider = defaultConfig { lspConfig = Just (formatLspConfig provider) }
diff --git a/test/testdata/format/Format.brittany.formatted.hs b/test/testdata/format/Format.brittany.formatted.hs
deleted file mode 100644
index 03aef77efa0..00000000000
--- a/test/testdata/format/Format.brittany.formatted.hs
+++ /dev/null
@@ -1,18 +0,0 @@
-module Format where
-import           Data.List
-
-import           Data.Int
-import           Prelude
-foo :: Int -> Int
-foo 3 = 2
-foo x = x
-bar :: String -> IO String
-bar s = do
-  x <- return "hello"
-  return "asdf"
-
-data Baz = Baz
-  { a :: Int
-  , b :: String
-  }
-
diff --git a/test/testdata/format/Format.brittany_post_floskell.formatted.hs b/test/testdata/format/Format.brittany_post_floskell.formatted.hs
deleted file mode 100644
index 6ea6a00b8dc..00000000000
--- a/test/testdata/format/Format.brittany_post_floskell.formatted.hs
+++ /dev/null
@@ -1,20 +0,0 @@
-module Format where
-
-import           Data.Int
-import           Data.List
-import           Prelude
-
-foo :: Int -> Int
-foo 3 = 2
-foo x = x
-
-bar :: String -> IO String
-bar s = do
-  x <- return "hello"
-  return "asdf"
-
-data Baz = Baz
-  { a :: Int
-  , b :: String
-  }
-