diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 06a838e5b5756..6a45d4fe336bb 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -151,7 +151,7 @@ self: super: {
     # Too strict bounds on doctest which isn't used, but is part of the configuration
     jailbreak = true;
     # vector-doctest seems to be broken when executed via ./Setup test
-    testTarget = lib.concatStringsSep " " [
+    testTargets = [
       "vector-tests-O0"
       "vector-tests-O2"
     ];
@@ -849,7 +849,7 @@ self: super: {
   CHXHtml = dontDistribute super.CHXHtml;
 
   # https://github.com/NixOS/nixpkgs/issues/6350
-  paypal-adaptive-hoops = overrideCabal (drv: { testTarget = "local"; }) super.paypal-adaptive-hoops;
+  paypal-adaptive-hoops = overrideCabal (drv: { testTargets = [ "local" ]; }) super.paypal-adaptive-hoops;
 
   # Avoid "QuickCheck >=2.3 && <2.10" dependency we cannot fulfill in lts-11.x.
   test-framework = dontCheck super.test-framework;
@@ -2629,7 +2629,7 @@ self: super: {
       rm Setup.hs
     '';
     # doctest suite uses doctest-parallel which still doesn't work in nixpkgs
-    testTarget = "tests";
+    testTargets = [ "tests" ];
   }) super.conduit-aeson;
 
   # Upper bounds are too strict:
@@ -2638,7 +2638,7 @@ self: super: {
 
   # Disabling doctests.
   regex-tdfa = overrideCabal {
-    testTarget = "regex-tdfa-unittest";
+    testTargets = [ "regex-tdfa-unittest" ];
   } super.regex-tdfa;
 
   # Missing test files https://github.com/kephas/xdg-basedir-compliant/issues/1
diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index 4730ed4e45733..b6067eb1a8245 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -75,7 +75,7 @@ self: super: builtins.intersectAttrs super {
       chmod +x "$out/bin/haskell-language-server"
       '';
     testToolDepends = [ self.cabal-install pkgs.git ];
-    testTarget = "func-test"; # wrapper test accesses internet
+    testTargets = [ "func-test" ]; # wrapper test accesses internet
     preCheck = ''
       export PATH=$PATH:$PWD/dist/build/haskell-language-server:$PWD/dist/build/haskell-language-server-wrapper
       export HOME=$TMPDIR
@@ -379,7 +379,7 @@ self: super: builtins.intersectAttrs super {
   digitalocean-kzs = dontCheck super.digitalocean-kzs;  # https://github.com/KazumaSATO/digitalocean-kzs/issues/1
   github-types = dontCheck super.github-types;          # http://hydra.cryp.to/build/1114046/nixlog/1/raw
   hadoop-rpc = dontCheck super.hadoop-rpc;              # http://hydra.cryp.to/build/527461/nixlog/2/raw
-  hjsonschema = overrideCabal (drv: { testTarget = "local"; }) super.hjsonschema;
+  hjsonschema = overrideCabal (drv: { testTargets = [ "local" ]; }) super.hjsonschema;
   marmalade-upload = dontCheck super.marmalade-upload;  # http://hydra.cryp.to/build/501904/nixlog/1/raw
   mongoDB = dontCheck super.mongoDB;
   network-transport-tcp = dontCheck super.network-transport-tcp;
@@ -741,7 +741,7 @@ self: super: builtins.intersectAttrs super {
 
   # Not running the "example" test because it requires a binary from lsps test
   # suite which is not part of the output of lsp.
-  lsp-test = overrideCabal (old: { testTarget = "tests func-test"; }) super.lsp-test;
+  lsp-test = overrideCabal (old: { testTargets = [ "tests" "func-test" ]; }) super.lsp-test;
 
   # the test suite attempts to run the binaries built in this package
   # through $PATH but they aren't in $PATH
@@ -1301,7 +1301,7 @@ self: super: builtins.intersectAttrs super {
       "-p" "!/oeis/"
     ];
     # disco-examples needs network access
-    testTarget = "disco-tests";
+    testTargets = [ "disco-tests" ];
   }) super.disco;
 
   # Apply a patch which hardcodes the store path of graphviz instead of using
diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 14afa3dfe6b44..6108a29d3a269 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -83,7 +83,9 @@ in
 , pkg-configDepends ? [], libraryPkgconfigDepends ? [], executablePkgconfigDepends ? [], testPkgconfigDepends ? [], benchmarkPkgconfigDepends ? []
 , testDepends ? [], testHaskellDepends ? [], testSystemDepends ? [], testFrameworkDepends ? []
 , benchmarkDepends ? [], benchmarkHaskellDepends ? [], benchmarkSystemDepends ? [], benchmarkFrameworkDepends ? []
-, testTarget ? "", testFlags ? []
+, # testTarget is deprecated starting with 25.05. Use testTargets instead.
+  testTarget ? lib.concatStringsSep " " testTargets
+, testTargets ? [], testFlags ? []
 , broken ? false
 , preCompileBuildDriver ? null, postCompileBuildDriver ? null
 , preUnpack ? null, postUnpack ? null