diff --git a/docs/examples.md b/docs/examples.md
index c61c754..4e3ad41 100644
--- a/docs/examples.md
+++ b/docs/examples.md
@@ -1,6 +1,4 @@
 # Example Configs
 
-- [nixtest itself](https://gitlab.com/TECHNOFAB/nixtest)
-    see `flake.nix` and `tests/`
 - [TECHNOFAB/nix-gitlab-ci](https://gitlab.com/TECHNOFAB/nix-gitlab-ci)
-    see `tests/`
+    see tests/
diff --git a/docs/reference.md b/docs/reference.md
deleted file mode 100644
index fe9d7cb..0000000
--- a/docs/reference.md
+++ /dev/null
@@ -1,53 +0,0 @@
-# Reference
-
-## `flakeModule`
-
-The `flakeModule` for [flake-parts](https://flake.parts).
-
-## `lib`
-
-### `module`
-
-The nix module for validation of inputs etc.
-Used internally by `mkNixtestConfig`.
-
-### `autodiscover`
-
-```nix
-autodiscover {
-  dir,
-  pattern ? ".*_test.nix",
-}
-```
-
-Finds all test files in `dir` matching `pattern`.
-Returns a list of modules (can be passed to `mkNixtest`'s `modules` arg).
-
-### `mkNixtestConfig`
-
-```nix
-mkNixtestConfig {
-  modules,
-  args ? {},
-}
-```
-
-Evaluates the test `modules`.
-`args` are passed to the modules using `_module.args = args`.
-
-**Noteworthy attributes**:
-
-- `app`: nixtest wrapper
-- `finalConfigJson`: derivation containing the tests json file
-
-### `mkNixtest`
-
-```nix
-mkNixtest {
-  modules,
-  args ? {},
-}
-```
-
-Creates the nixtest wrapper, using the tests in `modules`.
-Basically `(mkNixtestConfig <arguments>).app`.
diff --git a/docs/usage.md b/docs/usage.md
index a329017..fbcccb3 100644
--- a/docs/usage.md
+++ b/docs/usage.md
@@ -2,9 +2,6 @@
 
 ## Flake Module
 
-The easiest way to use Nixtest is probably using the flakeModule.
-Just import `nixtest.flakeModule`, then define suites and tests in `perSystem`:
-
 ```nix
 {
   inputs.nixtest.url = "gitlab:TECHNOFAB/nixtest?dir=lib";
@@ -37,25 +34,10 @@ Just import `nixtest.flakeModule`, then define suites and tests in `perSystem`:
 
 ## Library
 
-You can also use the lib directly, like this for example:
+You can also integrate nixtest in your own workflow by using the lib functions directly.
+Check out `flakeModule.nix` to see how it's used there.
 
-```nix
-packages.tests = ntlib.mkNixtest {
-  modules = ntlib.autodiscover {dir = ./tests;};
-  args = {
-    inherit pkgs ntlib;
-  };
-};
-```
-
-This will auto-discover all test files ending with `_test.nix`.
-See [reference](reference.md) for all params to `autodiscover`.
-
-`ntlib` can be defined like this:
-
-```nix
-ntlib = inputs.nixtests.lib {inherit pkgs;};
-```
+<!-- TODO: more detailed? -->
 
 ## Define Tests
 
@@ -102,17 +84,9 @@ Examples:
     # to make it more reproducible and cleaner, use --pure to switch to pure
     # mode which will unset all env variables before running the test. That 
     # requires you to set PATH yourself then:
-    # 
-    # ''
-    #  export PATH="${lib.makeBinPath [pkgs.gnugrep]}"
-    #  grep -q "test" ${builtins.toFile "test" "test"}
-    # '';
-    #
-    # you can also use the helpers to make it nicer to read:
     ''
-      ${ntlib.helpers.path [pkgs.gnugrep]}
-      ${ntlib.helpers.scriptHelpers}  # this adds helpers like assert etc.
-      assert_file_contains ${builtins.toFile "test" "test"} "test" "file should contain 'test'"
+      export PATH="${lib.makeBinPath [pkgs.gnugrep]}"
+      grep -q "test" ${builtins.toFile "test" "test"}
     '';
   }
   {
@@ -128,7 +102,3 @@ Examples:
   }
 ]
 ```
-
-!!! note
-
-    for more examples see [examples](./examples.md)
diff --git a/flake.nix b/flake.nix
index 72f86bd..bcc7b54 100644
--- a/flake.nix
+++ b/flake.nix
@@ -11,6 +11,7 @@
         inputs.nix-gitlab-ci.flakeModule
         inputs.nix-devtools.flakeModule
         inputs.nix-mkdocs.flakeModule
+        ./lib/flakeModule.nix
       ];
       systems = import systems;
       flake = {};
@@ -62,6 +63,100 @@
           };
         };
 
+        nixtest = {
+          skip = "skip.*d";
+          suites = {
+            "suite-one" = {
+              pos = __curPos;
+              tests = [
+                {
+                  name = "test-one";
+                  # required to figure out file and line, but optional
+                  expected = 1;
+                  actual = 1;
+                }
+                {
+                  name = "fail";
+                  expected = 0;
+                  actual = "meow";
+                }
+                {
+                  name = "snapshot-test";
+                  type = "snapshot";
+                  actual = "test";
+                }
+                {
+                  name = "test-snapshot-drv";
+                  type = "snapshot";
+                  actualDrv = pkgs.runCommand "test-snapshot" {} ''
+                    echo '"snapshot drv"' > $out
+                  '';
+                }
+                {
+                  name = "test-error-drv";
+                  expected = null;
+                  actualDrv = pkgs.runCommand "test-error-drv" {} ''
+                    echo "This works, but its better to just write 'fail' to \$out and expect 'success' or sth."
+                    exit 1
+                  '';
+                }
+                {
+                  name = "test-script";
+                  type = "script";
+                  script = ''
+                    echo Test something here
+                    # required in pure mode:
+                    export PATH="${lib.makeBinPath [pkgs.gnugrep]}"
+                    grep -q "test" ${builtins.toFile "test" "test"}
+                  '';
+                }
+              ];
+            };
+            "other-suite".tests = [
+              {
+                name = "obj-snapshot";
+                type = "snapshot";
+                pos = __curPos;
+                actual = {hello = "world";};
+              }
+              {
+                name = "pretty-snapshot";
+                type = "snapshot";
+                format = "pretty";
+                pos = __curPos;
+                actual = {
+                  example = args: {};
+                  example2 = {
+                    drv = pkgs.hello;
+                  };
+                };
+              }
+              {
+                name = "pretty-unit";
+                format = "pretty";
+                pos = __curPos;
+                expected = pkgs.hello;
+                actual = pkgs.hello;
+              }
+              {
+                name = "test-drv";
+                pos = __curPos;
+                expected = {a = "b";};
+                actualDrv = pkgs.runCommand "test-something" {} ''
+                  echo "Simulating taking some time"
+                  sleep 1
+                  echo '{"a":"b"}' > $out
+                '';
+              }
+              {
+                name = "skipped";
+                expected = null;
+                actual = null;
+              }
+            ];
+          };
+        };
+
         doc = {
           path = ./docs;
           deps = pp: [
@@ -106,13 +201,11 @@
             nav = [
               {"Introduction" = "index.md";}
               {"Usage" = "usage.md";}
-              {"Reference" = "reference.md";}
               {"CLI" = "cli.md";}
               {"Example Configs" = "examples.md";}
             ];
             markdown_extensions = [
               "pymdownx.superfences"
-              "admonition"
             ];
             extra.analytics = {
               provider = "umami";
@@ -143,10 +236,10 @@
         ci = {
           stages = ["test" "build" "deploy"];
           jobs = {
-            "test:lib" = {
+            "test" = {
               stage = "test";
               script = [
-                "nix run .#tests -- --junit=junit.xml"
+                "nix run .#nixtests:run -- --junit=junit.xml"
               ];
               allow_failure = true;
               artifacts = {
@@ -207,17 +300,7 @@
           };
         };
 
-        packages = let
-          ntlib = import ./lib {inherit pkgs lib;};
-        in {
-          default = pkgs.callPackage ./package.nix {};
-          tests = ntlib.mkNixtest {
-            modules = ntlib.autodiscover {dir = ./tests;};
-            args = {
-              inherit pkgs ntlib;
-            };
-          };
-        };
+        packages.default = pkgs.callPackage ./package.nix {};
       };
     };
 
diff --git a/lib/default.nix b/lib/default.nix
index 2aa3683..e8b7f97 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -1,66 +1,62 @@
 {
   pkgs,
   lib ? pkgs.lib,
+  self ? "",
   ...
-}: let
-  inherit (lib) evalModules toList;
-in rec {
-  helpers = import ./testHelpers.nix {inherit lib;};
-
-  mkBinary = {
-    nixtests,
-    extraParams,
+}: {
+  mkTest = {
+    type ? "unit",
+    name,
+    description ? "",
+    format ? "json",
+    expected ? null,
+    actual ? null,
+    actualDrv ? null,
+    script ? null,
+    pos ? null,
   }: let
-    program = pkgs.callPackage ../package.nix {};
+    fileRelative = lib.removePrefix ((toString self) + "/") pos.file;
+    actual' =
+      if format == "json"
+      then actual
+      else lib.generators.toPretty {} actual;
+    expected' =
+      if format == "json"
+      then expected
+      else lib.generators.toPretty {} expected;
   in
-    (pkgs.writeShellScriptBin "nixtests:run" ''
-      ${program}/bin/nixtest --tests=${nixtests} ${extraParams} "$@"
-    '')
-    // {
-      tests = nixtests;
+    assert lib.assertMsg (!(type == "script" && script == null)) "test ${name} has type 'script' but no script was passed"; {
+      inherit type name description;
+      actual = actual';
+      expected = expected';
+      # discard string context, otherwise it's being built instantly which we don't want
+      actualDrv = builtins.unsafeDiscardStringContext (actualDrv.drvPath or "");
+      script =
+        if script != null
+        then
+          builtins.unsafeDiscardStringContext
+          (pkgs.writeShellScript "nixtest-${name}" ''
+            # show which line failed the test
+            set -x
+            ${script}
+          '').drvPath
+        else null;
+      pos =
+        if pos == null
+        then ""
+        else "${fileRelative}:${toString pos.line}";
     };
-
+  mkSuite = name: tests: {
+    inherit name tests;
+  };
   exportSuites = suites: let
     suitesList =
       if builtins.isList suites
       then suites
       else [suites];
-    suitesMapped = builtins.toJSON suitesList;
+    testsMapped = builtins.toJSON suitesList;
   in
     pkgs.runCommand "tests.json" {} ''
-      echo '${suitesMapped}' > $out
+      echo '${testsMapped}' > $out
     '';
-
-  module = import ./module.nix {inherit lib pkgs;};
-
-  autodiscover = {
-    dir,
-    pattern ? ".*_test.nix",
-  }: let
-    files = builtins.readDir dir;
-    matchingFiles = builtins.filter (name: builtins.match pattern name != null) (builtins.attrNames files);
-    imports = map (file: /${dir}/${file}) matchingFiles;
-  in {
-    inherit imports;
-    # automatically set the base so test filepaths are easier to read
-    config.base = builtins.toString dir + "/";
-  };
-
-  mkNixtestConfig = {
-    modules,
-    args ? {},
-    ...
-  }:
-    (evalModules {
-      modules =
-        (toList modules)
-        ++ [
-          module
-          {
-            _module.args = args;
-          }
-        ];
-    }).config;
-
-  mkNixtest = args: (mkNixtestConfig args).app;
 }
diff --git a/lib/flakeModule.nix b/lib/flakeModule.nix
index 1d7e406..6068aea 100644
--- a/lib/flakeModule.nix
+++ b/lib/flakeModule.nix
@@ -15,14 +15,56 @@ in {
       nixtests-lib = import ./. {inherit pkgs self;};
     in {
       options.nixtest = mkOption {
-        type = types.submodule (nixtests-lib.module);
+        type = types.submodule ({...}: {
+          options = {
+            skip = mkOption {
+              type = types.str;
+              default = "";
+              description = "Which tests to skip (regex)";
+            };
+            suites = mkOption {
+              type = types.attrsOf (types.submodule {
+                options = {
+                  tests = mkOption {
+                    type = types.listOf types.attrs;
+                    default = [];
+                  };
+                  pos = mkOption {
+                    type = types.nullOr types.attrs;
+                    default = null;
+                  };
+                };
+              });
+              default = {};
+            };
+          };
+        });
         default = {};
       };
-      config.nixtest.base = toString self + "/";
 
-      config.legacyPackages = {
-        "nixtests" = config.nixtest.finalConfigJson;
-        "nixtests:run" = config.nixtest.app;
+      config.legacyPackages = rec {
+        "nixtests" = let
+          suites = map (suiteName: let
+            suite = builtins.getAttr suiteName config.nixtest.suites;
+          in
+            nixtests-lib.mkSuite
+            suiteName
+            (map (test:
+              nixtests-lib.mkTest ({
+                  # default pos to suite's pos if given
+                  pos = suite.pos;
+                }
+                // test))
+            suite.tests))
+          (builtins.attrNames config.nixtest.suites);
+        in
+          nixtests-lib.exportSuites suites;
+        "nixtests:run" = let
+          program = pkgs.callPackage ./../package.nix {};
+        in
+          pkgs.writeShellScriptBin "nixtests:run" ''
+            ${program}/bin/nixtest --tests=${nixtests} --skip="${config.nixtest.skip}" "$@"
+          '';
       };
     }
   );
diff --git a/lib/module.nix b/lib/module.nix
deleted file mode 100644
index 14746e4..0000000
--- a/lib/module.nix
+++ /dev/null
@@ -1,188 +0,0 @@
-{
-  pkgs,
-  lib,
-  ...
-}: let
-  inherit (lib) mkOptionType mkOption types;
-
-  nixtest-lib = import ./default.nix {inherit pkgs lib;};
-
-  unsetType = mkOptionType {
-    name = "unset";
-    description = "unset";
-    descriptionClass = "noun";
-    check = value: true;
-  };
-  unset = {
-    _type = "unset";
-  };
-  isUnset = lib.isType "unset";
-
-  filterUnset = value:
-    if builtins.isAttrs value && !builtins.hasAttr "_type" value
-    then let
-      filteredAttrs = builtins.mapAttrs (n: v: filterUnset v) value;
-    in
-      lib.filterAttrs (name: value: (!isUnset value)) filteredAttrs
-    else if builtins.isList value
-    then builtins.filter (elem: !isUnset elem) (map filterUnset value)
-    else value;
-
-  testsSubmodule = {
-    config,
-    testsBase,
-    pos,
-    ...
-  }: {
-    options = {
-      pos = mkOption {
-        type = types.either types.attrs unsetType;
-        default = pos;
-        apply = val:
-          if isUnset val
-          then val
-          else let
-            fileRelative = lib.removePrefix testsBase val.file;
-          in "${fileRelative}:${toString val.line}";
-      };
-      type = mkOption {
-        type = types.enum ["unit" "snapshot" "script"];
-        default = "unit";
-        apply = value:
-          assert lib.assertMsg (value != "script" || !isUnset config.script)
-          "test '${config.name}' as type 'script' requires 'script' to be set";
-          assert lib.assertMsg (value != "unit" || !isUnset config.expected)
-          "test '${config.name}' as type 'unit' requires 'expected' to be set";
-          assert lib.assertMsg (
-            let
-              actualIsUnset = isUnset config.actual;
-              actualDrvIsUnset = isUnset config.actualDrv;
-            in
-              (value != "unit")
-              || (!actualIsUnset && actualDrvIsUnset)
-              || (actualIsUnset && !actualDrvIsUnset)
-          )
-          "test '${config.name}' as type 'unit' requires only 'actual' OR 'actualDrv' to be set"; value;
-      };
-      name = mkOption {
-        type = types.str;
-      };
-      description = mkOption {
-        type = types.either types.str unsetType;
-        default = unset;
-      };
-      format = mkOption {
-        type = types.enum ["json" "pretty"];
-        default = "json";
-      };
-      expected = mkOption {
-        type = types.anything;
-        default = unset;
-        apply = val:
-          if isUnset val || config.format == "json"
-          then val
-          else lib.generators.toPretty {} val;
-      };
-      actual = mkOption {
-        type = types.anything;
-        default = unset;
-        apply = val:
-          if isUnset val || config.format == "json"
-          then val
-          else lib.generators.toPretty {} val;
-      };
-      actualDrv = mkOption {
-        type = types.either types.package unsetType;
-        default = unset;
-        apply = val:
-        # keep unset value
-          if isUnset val
-          then val
-          else builtins.unsafeDiscardStringContext (val.drvPath or "");
-      };
-      script = mkOption {
-        type = types.either types.str unsetType;
-        default = unset;
-        apply = val:
-          if isUnset val
-          then val
-          else
-            builtins.unsafeDiscardStringContext
-            (pkgs.writeShellScript "nixtest-${config.name}" val).drvPath;
-      };
-    };
-  };
-
-  suitesSubmodule = {
-    name,
-    config,
-    testsBase,
-    ...
-  }: {
-    options = {
-      name = mkOption {
-        type = types.str;
-        default = name;
-      };
-      pos = mkOption {
-        type = types.either types.attrs unsetType;
-        default = unset;
-      };
-      tests = mkOption {
-        type = types.listOf (types.submoduleWith {
-          modules = [testsSubmodule];
-          specialArgs = {
-            inherit (config) pos;
-            inherit testsBase;
-          };
-        });
-        default = [];
-      };
-    };
-  };
-
-  nixtestSubmodule = {config, ...}: {
-    options = {
-      base = mkOption {
-        description = "Base directory of the tests, will be removed from the test file path";
-        type = types.str;
-        default = "";
-      };
-      skip = mkOption {
-        type = types.str;
-        default = "";
-      };
-      suites = mkOption {
-        type = types.attrsOf (types.submoduleWith {
-          modules = [suitesSubmodule];
-          specialArgs = {
-            testsBase = config.base;
-          };
-        });
-        default = {};
-        apply = suites:
-          map (
-            n: filterUnset (builtins.removeAttrs suites.${n} ["pos"])
-          )
-          (builtins.attrNames suites);
-      };
-
-      finalConfigJson = mkOption {
-        internal = true;
-        type = types.package;
-      };
-      app = mkOption {
-        internal = true;
-        type = types.package;
-      };
-    };
-    config = {
-      finalConfigJson = nixtest-lib.exportSuites config.suites;
-      app = nixtest-lib.mkBinary {
-        nixtests = config.finalConfigJson;
-        extraParams = ''--skip="${config.skip}"'';
-      };
-    };
-  };
-in
-  nixtestSubmodule
diff --git a/lib/scriptHelpers.sh b/lib/scriptHelpers.sh
deleted file mode 100644
index 0b59829..0000000
--- a/lib/scriptHelpers.sh
+++ /dev/null
@@ -1,51 +0,0 @@
-output=
-exit_code=
-
-function assert() {
-  test $1 || { echo "Assertion '$1' failed: $2" >&2; exit 1; }
-}
-function assert_eq() {
-  assert "$1 -eq $2" "$3"
-}
-function assert_not_eq() {
-  assert "$1 -ne $2" "$3"
-}
-function assert_contains() {
-  echo "$1" | grep -q -- "$2" || {
-    echo "Assertion failed: $3. $1 does not contain $2" >&2;
-    exit 1;
-  }
-}
-function assert_not_contains() {
-  echo "$1" | grep -q -- "$2" && {
-    echo "Assertion failed: $3. $1 does contain $2" >&2;
-    exit 1;
-  }
-}
-function assert_file_contains() {
-  grep -q -- "$2" $1 || {
-    echo "Assertion failed: $3. $1 does not contain $2" >&2;
-    exit 1;
-  }
-}
-function assert_file_not_contains() {
-  grep -q -- "$2" $1 && {
-    echo "Assertion failed: $3. $1 does contain $2" >&2;
-    exit 1;
-  }
-}
-
-function tmpdir() {
-  dir=$(mktemp -d)
-  trap "rm -rf $dir" EXIT
-  echo -n "$dir"
-}
-function tmpfile() {
-  file=$(mktemp)
-  trap "rm -f $file" EXIT
-  echo -n "$file"
-}
-function run() {
-  output=$($@ 2>&1)
-  exit_code=$?
-}
diff --git a/lib/testHelpers.nix b/lib/testHelpers.nix
deleted file mode 100644
index c86a6a8..0000000
--- a/lib/testHelpers.nix
+++ /dev/null
@@ -1,7 +0,0 @@
-{lib, ...}: {
-  path = pkgs: "export PATH=${lib.makeBinPath pkgs}";
-  pathAdd = pkgs: "export PATH=$PATH:${lib.makeBinPath pkgs}";
-  scriptHelpers = builtins.readFile ./scriptHelpers.sh;
-  toJsonFile = any: builtins.toFile "actual" (builtins.unsafeDiscardStringContext (builtins.toJSON any));
-  toPrettyFile = any: builtins.toFile "actual" (lib.generators.toPretty {} any);
-}
diff --git a/tests/fixtures/sample_test.nix b/tests/fixtures/sample_test.nix
deleted file mode 100644
index dcc2fb1..0000000
--- a/tests/fixtures/sample_test.nix
+++ /dev/null
@@ -1,97 +0,0 @@
-{
-  lib,
-  pkgs,
-  ...
-}: {
-  skip = "skip.*d";
-  suites = {
-    "suite-one" = {
-      # required to figure out file and line, but optional
-      pos = __curPos;
-      tests = [
-        {
-          name = "test-one";
-          expected = 1;
-          actual = 1;
-        }
-        {
-          name = "fail";
-          expected = 0;
-          actual = "meow";
-        }
-        {
-          name = "snapshot-test";
-          type = "snapshot";
-          actual = "test";
-        }
-        {
-          name = "test-snapshot-drv";
-          type = "snapshot";
-          actualDrv = pkgs.runCommand "test-snapshot" {} ''
-            echo '"snapshot drv"' > $out
-          '';
-        }
-        {
-          name = "test-error-drv";
-          expected = null;
-          actualDrv = pkgs.runCommand "test-error-drv" {} ''
-            echo "This works, but its better to just write 'fail' to \$out and expect 'success' or sth."
-            exit 1
-          '';
-        }
-        {
-          name = "test-script";
-          type = "script";
-          script = ''
-            echo Test something here
-            # required in pure mode:
-            export PATH="${lib.makeBinPath [pkgs.gnugrep]}"
-            grep -q "test" ${builtins.toFile "test" "test"}
-          '';
-        }
-      ];
-    };
-    "other-suite".tests = [
-      {
-        name = "obj-snapshot";
-        type = "snapshot";
-        pos = __curPos;
-        actual = {hello = "world";};
-      }
-      {
-        name = "pretty-snapshot";
-        type = "snapshot";
-        format = "pretty";
-        pos = __curPos;
-        actual = {
-          example = args: {};
-          example2 = {
-            drv = pkgs.hello;
-          };
-        };
-      }
-      {
-        name = "pretty-unit";
-        format = "pretty";
-        pos = __curPos;
-        expected = pkgs.hello;
-        actual = pkgs.hello;
-      }
-      {
-        name = "test-drv";
-        pos = __curPos;
-        expected = {a = "b";};
-        actualDrv = pkgs.runCommand "test-something" {} ''
-          echo "Simulating taking some time"
-          sleep 1
-          echo '{"a":"b"}' > $out
-        '';
-      }
-      {
-        name = "skipped";
-        expected = null;
-        actual = null;
-      }
-    ];
-  };
-}
diff --git a/tests/lib_test.nix b/tests/lib_test.nix
deleted file mode 100644
index 4437cf3..0000000
--- a/tests/lib_test.nix
+++ /dev/null
@@ -1,90 +0,0 @@
-{
-  pkgs,
-  ntlib,
-  ...
-}: {
-  suites."Lib Tests" = {
-    pos = __curPos;
-    tests = [
-      {
-        name = "autodiscovery";
-        type = "script";
-        script = let
-          actual = ntlib.helpers.toPrettyFile (ntlib.autodiscover {
-            dir = ./fixtures;
-          });
-        in
-          # sh
-          ''
-            ${ntlib.helpers.path [pkgs.gnugrep]}
-            ${ntlib.helpers.scriptHelpers}
-            assert_file_contains ${actual} "sample_test.nix" "should find sample_test.nix"
-            assert_file_contains ${actual} "base = \"/nix/store/.*-source/tests/fixtures/\"" "should set base to fixtures dir"
-          '';
-      }
-      {
-        name = "binary";
-        type = "script";
-        script = let
-          binary =
-            (ntlib.mkBinary {
-              nixtests = "stub";
-              extraParams = "--pure";
-            })
-            + "/bin/nixtests:run";
-        in
-          # sh
-          ''
-            ${ntlib.helpers.path [pkgs.gnugrep]}
-            ${ntlib.helpers.scriptHelpers}
-            assert_file_contains ${binary} "nixtest" "should contain nixtest"
-            assert_file_contains ${binary} "--pure" "should contain --pure arg"
-            assert_file_contains ${binary} "--tests=stub" "should contain --tests arg"
-
-            run "${binary} --help"
-            assert_eq $exit_code 0 "should exit 0"
-            assert_contains "$output" "Usage of nixtest" "should show help"
-
-            run "${binary}"
-            assert_eq $exit_code 1 "should exit 1"
-            assert_contains "$output" "Tests file does not exist"
-          '';
-      }
-      {
-        name = "full run with fixtures";
-        type = "script";
-        script = let
-          binary =
-            (ntlib.mkNixtest {
-              modules = ntlib.autodiscover {dir = ./fixtures;};
-              args = {inherit pkgs;};
-            })
-            + "/bin/nixtests:run";
-        in
-          # sh
-          ''
-            ${ntlib.helpers.path [pkgs.gnugrep pkgs.mktemp]}
-            ${ntlib.helpers.scriptHelpers}
-
-            TMPDIR=$(tmpdir)
-            # start without nix & env binaries to expect errors
-            run "${binary} --pure --junit=$TMPDIR/junit.xml"
-            assert "$exit_code -eq 2" "should exit 2"
-            assert "-f $TMPDIR/junit.xml" "should create junit.xml"
-            assert_contains "$output" "executable file not found" "nix should not be found in pure mode"
-
-            # now add required deps
-            ${ntlib.helpers.pathAdd [pkgs.nix pkgs.coreutils]}
-            run "${binary} --pure --junit=$TMPDIR/junit2.xml"
-            assert "$exit_code -eq 2" "should exit 2"
-            assert "-f $TMPDIR/junit2.xml" "should create junit2.xml"
-            assert_not_contains "$output" "executable file not found" "nix should now exist"
-            assert_contains "$output" "suite-one" "should contain suite-one"
-            assert_contains "$output" "8/11 (1 SKIPPED)" "should be 8/11 total"
-            assert_contains "$output" "ERROR" "should contain an error"
-            assert_contains "$output" "SKIP" "should contain a skip"
-          '';
-      }
-    ];
-  };
-}