diff --git a/.github/workflows/ci-nix.yaml b/.github/workflows/ci-nix.yaml
index 760c1a4a727..58acc581fa6 100644
--- a/.github/workflows/ci-nix.yaml
+++ b/.github/workflows/ci-nix.yaml
@@ -45,8 +45,16 @@ jobs:
         name: cardano-scaling
         authToken: '${{ secrets.CACHIX_CARDANO_SCALING_AUTH_TOKEN }}'
 
-    - name: ❓ Test
-      if: ${{ matrix.package != 'hydra-tui' }}
+    - name: ❓ Test (Pure)
+      if: ${{ matrix.package == 'hydra-plutus'
+           || matrix.package == 'plutus-cbor'
+           || matrix.package == 'plutus-merkle-tree' }}
+      run: |
+        nix build .#checks.x86_64-linux.${{ matrix.package }}
+
+    - name: ❓ Test (Impure)
+      if: ${{ matrix.package == 'hydra-cluster'
+           || matrix.package == 'hydra-node' }}
       run: |
         cd ${{ matrix.package }}
         nix build .#${{ matrix.package }}-tests
diff --git a/flake.nix b/flake.nix
index f5c9fe76cbc..3931591a4e1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -119,6 +119,21 @@
               ];
               treefmt = pkgs.treefmt;
             };
+            hydra-plutus = lu.tee-check {
+              name = "hydra-plutus";
+              src = self;
+              exe = "${packages.hydra-plutus-tests}/bin/tests";
+            };
+            plutus-cbor = lu.tee-check {
+              name = "plutus-cbor";
+              src = self;
+              exe = "${packages.plutus-cbor-tests}/bin/tests";
+            };
+            plutus-merkle-tree = lu.tee-check {
+              name = "plutus-merkle-tree";
+              src = self;
+              exe = "${packages.plutus-merkle-tree-tests}/bin/tests";
+            };
           };
 
           devShells = import ./nix/hydra/shell.nix {
diff --git a/hydra-plutus/hydra-plutus.cabal b/hydra-plutus/hydra-plutus.cabal
index 3396c70584f..642579b44eb 100644
--- a/hydra-plutus/hydra-plutus.cabal
+++ b/hydra-plutus/hydra-plutus.cabal
@@ -78,7 +78,7 @@ library
     , template-haskell
     , time
 
-test-suite tests
+executable tests
   import:             project-config
   ghc-options:        -threaded -rtsopts -with-rtsopts=-N
   hs-source-dirs:     test
diff --git a/nix/hydra/packages.nix b/nix/hydra/packages.nix
index e419d8a7947..a9605ab4229 100644
--- a/nix/hydra/packages.nix
+++ b/nix/hydra/packages.nix
@@ -121,18 +121,10 @@ rec {
 
   hydraw-static = musl64Pkgs.hydraw.components.exes.hydraw;
 
-  plutus-cbor-tests = pkgs.mkShellNoCC {
-    name = "plutus-cbor-tests";
-    buildInputs = [ nativePkgs.plutus-cbor.components.tests.tests ];
-  };
-  plutus-merkle-tree-tests = pkgs.mkShellNoCC {
-    name = "plutus-merkle-tree-tests";
-    buildInputs = [ nativePkgs.plutus-merkle-tree.components.tests.tests ];
-  };
-  hydra-plutus-tests = pkgs.mkShellNoCC {
-    name = "hydra-plutus-tests";
-    buildInputs = [ nativePkgs.hydra-plutus.components.tests.tests ];
-  };
+  plutus-cbor-tests = nativePkgs.plutus-cbor.components.exes.tests;
+
+  plutus-merkle-tree-tests = nativePkgs.plutus-merkle-tree.components.exes.tests;
+  hydra-plutus-tests = nativePkgs.hydra-plutus.components.exes.tests;
   hydra-node-tests = pkgs.mkShellNoCC {
     name = "hydra-node-tests";
     buildInputs = [
diff --git a/plutus-cbor/plutus-cbor.cabal b/plutus-cbor/plutus-cbor.cabal
index ac10dee4f4b..564fff0f184 100644
--- a/plutus-cbor/plutus-cbor.cabal
+++ b/plutus-cbor/plutus-cbor.cabal
@@ -46,7 +46,7 @@ library
 
   exposed-modules: Plutus.Codec.CBOR.Encoding
 
-test-suite tests
+executable tests
   import:             project-config
   type:               exitcode-stdio-1.0
   hs-source-dirs:     test
diff --git a/plutus-merkle-tree/plutus-merkle-tree.cabal b/plutus-merkle-tree/plutus-merkle-tree.cabal
index d14b7a209de..3f2c1311294 100644
--- a/plutus-merkle-tree/plutus-merkle-tree.cabal
+++ b/plutus-merkle-tree/plutus-merkle-tree.cabal
@@ -48,7 +48,7 @@ library
     , plutus-tx
     , text
 
-test-suite tests
+executable tests
   import:             project-config
   type:               exitcode-stdio-1.0
   hs-source-dirs:     test