diff --git a/Makefile b/Makefile
index 8e06b3a7f1e..c7b2b1bea29 100644
--- a/Makefile
+++ b/Makefile
@@ -70,11 +70,6 @@ cabal-install-dev : cabal-install/cabal-install.cabal.pp
 	@echo "tell git to ignore changes to cabal-install.cabal:"
 	@echo "git update-index --assume-unchanged cabal-install/cabal-install.cabal"
 
-cabal-install-monolithic : cabal-install/cabal-install.cabal.pp
-	runghc cabal-dev-scripts/src/Preprocessor.hs -o cabal-install/cabal-install.cabal -f CABAL_FLAG_LIB -f CABAL_FLAG_MONOLITHIC cabal-install/cabal-install.cabal.pp
-	@echo "tell git to ignore changes to cabal-install.cabal:"
-	@echo "git update-index --assume-unchanged cabal-install/cabal-install.cabal"
-
 # extra-source-files generation
 
 gen-extra-source-files : gen-extra-source-files-lib gen-extra-source-files-cli
diff --git a/cabal-install/cabal-install.cabal.pp b/cabal-install/cabal-install.cabal.pp
index 23d26f7133f..324c12dc7f3 100644
--- a/cabal-install/cabal-install.cabal.pp
+++ b/cabal-install/cabal-install.cabal.pp
@@ -436,77 +436,6 @@
     $CABAL_BUILDINFO
 %endif
 #
-# MONOLITHIC exe additions
-#
-%if CABAL_FLAG_LIB
-%if CABAL_FLAG_MONOLITHIC
-    -- Monolithic: tests fused into executable
-    hs-source-dirs: tests
-    other-modules:
-        UnitTests
-        MemoryUsageTests
-        SolverQuickCheck
-        IntegrationTests2
-
-        UnitTests.Distribution.Client.ArbitraryInstances
-        UnitTests.Distribution.Client.FileMonitor
-        UnitTests.Distribution.Client.Get
-        UnitTests.Distribution.Client.GenericInstances
-        UnitTests.Distribution.Client.GZipUtils
-        UnitTests.Distribution.Client.Glob
-        UnitTests.Distribution.Client.IndexUtils.Timestamp
-        UnitTests.Distribution.Client.InstallPlan
-        UnitTests.Distribution.Client.JobControl
-        UnitTests.Distribution.Client.ProjectConfig
-        UnitTests.Distribution.Client.Sandbox
-        UnitTests.Distribution.Client.Sandbox.Timestamp
-        UnitTests.Distribution.Client.Store
-        UnitTests.Distribution.Client.Tar
-        UnitTests.Distribution.Client.Targets
-        UnitTests.Distribution.Client.TreeDiffInstances
-        UnitTests.Distribution.Client.UserConfig
-        UnitTests.Distribution.Client.VCS
-        UnitTests.Distribution.Solver.Modular.Builder
-        UnitTests.Distribution.Solver.Modular.DSL.TestCaseUtils
-        UnitTests.Distribution.Solver.Modular.MemoryUsage
-        UnitTests.Distribution.Solver.Modular.QuickCheck
-        UnitTests.Distribution.Solver.Modular.QuickCheck.Utils
-        UnitTests.Distribution.Solver.Modular.RetryLog
-        UnitTests.Distribution.Solver.Modular.Solver
-        UnitTests.Distribution.Solver.Modular.WeightedPSQ
-        UnitTests.Options
-        UnitTests.TempTestDir
-
-    cpp-options: -DMONOLITHIC
-    build-depends:
-        Cabal      == 3.3.*,
-        cabal-install-solver-dsl,
-        QuickCheck >= 2.8.2,
-        array,
-        async,
-        bytestring,
-        containers,
-        deepseq,
-        directory,
-        edit-distance,
-        filepath,
-        hashable,
-        mtl,
-        network,
-        network-uri,
-        pretty-show >= 1.6.15,
-        random,
-        tagged,
-        tar,
-        tasty >= 1.2.3 && < 1.3,
-        tasty-hunit >= 0.10,
-        tasty-quickcheck,
-        tree-diff,
-        time,
-        zlib
-%endif
-%endif
-#
 # Test-suites
 # disable if we don't configure with an (internal) libs
 #
diff --git a/cabal-install/main/Main.hs b/cabal-install/main/Main.hs
index e00df125c59..e34c6d08798 100644
--- a/cabal-install/main/Main.hs
+++ b/cabal-install/main/Main.hs
@@ -197,33 +197,10 @@ import Control.Exception        (SomeException(..), try)
 import Control.Monad            (mapM_)
 import Data.Version             (showVersion)
 
-#ifdef MONOLITHIC
-import qualified UnitTests
-import qualified MemoryUsageTests
-import qualified SolverQuickCheck
-import qualified IntegrationTests2
-import qualified System.Environment as Monolithic
-#endif
-
 -- | Entry point
 --
 main :: IO ()
-#ifdef MONOLITHIC
 main = do
-    mb_exec <- Monolithic.lookupEnv "CABAL_INSTALL_MONOLITHIC_MODE"
-    case mb_exec of
-        Just "UnitTests"         -> UnitTests.main
-        Just "MemoryUsageTests"  -> MemoryUsageTests.main
-        Just "SolverQuickCheck"  -> SolverQuickCheck.main
-        Just "IntegrationTests2" -> IntegrationTests2.main
-        Just s -> error $ "Unrecognized mode '" ++ show s ++ "' in CABAL_INSTALL_MONOLITHIC_MODE"
-        Nothing -> main'
-#else
-main = main'
-#endif
-
-main' :: IO ()
-main' = do
   -- Enable line buffering so that we can get fast feedback even when piped.
   -- This is especially important for CI and build systems.
   hSetBuffering stdout LineBuffering