The test us a unit test, not functional. No need for the test yaml file either.

tests/pytests/functional/modules/test_yaml.py

@@ -1,74 +0,0 @@
-from pathlib import Path
-
-import pytest
-
-import salt.loader
-import salt.modules.config
-import salt.modules.cp
-import salt.modules.slsutil
-import salt.utils.files
-from tests.support.mock import MagicMock
-
-try:
-    import salt.modules.yaml
-    import salt.utils.yamllint
-
-    YAMLLINT_AVAILABLE = True
-except ImportError:
-    YAMLLINT_AVAILABLE = False
-
-
-pytestmark = [
-    pytest.mark.skipif(
-        YAMLLINT_AVAILABLE is False, reason="The 'yammllint' pacakge is not available"
-    ),
-]
-
-
-@pytest.fixture
-def configure_loader_modules(minion_opts):
-    cached_file = str(Path(__file__).parent / "testyaml.yaml")
-    return {
-        salt.modules.yaml: {
-            "__salt__": {
-                "config.get": salt.modules.config.get,
-                "cp.cache_file": MagicMock(
-                    salt.modules.cp.cache_file, autospec=True, return_value=cached_file
-                ),
-                "slsutil.renderer": MagicMock(
-                    salt.modules.slsutil.renderer,
-                    autospec=True,
-                    return_value="key: value\n",
-                ),
-            },
-            "__opts__": minion_opts,
-            "__utils__": {
-                "files.fopen": salt.utils.files.fopen,
-                "yamllint.lint": salt.utils.yamllint.lint,
-            },
-        },
-        salt.modules.config: {
-            "__opts__": minion_opts,
-        },
-    }
-
-
-def test_lint_yaml():
-    """
-    ensure that we can lint from the yaml lint utils
-    """
-    assert salt.modules.yaml.lint("salt://test/test.sls") == {
-        "problems": [],
-        "source": "key:\n  value\n",
-    }
-
-
-def test_lint_pre_render():
-    assert salt.modules.yaml.lint("salt://test.test.sls", pre_render="jinja") == {
-        "problems": [],
-        "source": "key: value\n",
-    }
-
-
-def test_yamllint_virtual():
-    assert salt.modules.yaml.__virtual__() == "yaml"

tests/pytests/functional/modules/testyaml.yaml

@@ -1,2 +0,0 @@
-key:
-  value

tests/pytests/unit/modules/test_yaml.py

@@ -0,0 +1,79 @@
+import os
+
+import pytest
+
+import salt.loader
+import salt.modules.config
+import salt.modules.cp
+import salt.modules.slsutil
+import salt.utils.files
+from tests.support.mock import MagicMock
+
+try:
+    import salt.modules.yaml
+    import salt.utils.yamllint
+
+    YAMLLINT_AVAILABLE = True
+except ImportError:
+    YAMLLINT_AVAILABLE = False
+
+
+pytestmark = [
+    pytest.mark.skip_on_windows(reason="Dam line breaks"),
+    pytest.mark.skipif(
+        YAMLLINT_AVAILABLE is False, reason="The 'yammllint' pacakge is not available"
+    ),
+]
+
+
+@pytest.fixture
+def configure_loader_modules(minion_opts):
+    with pytest.helpers.temp_file(
+        "testyaml.yaml", contents="key:\n  value\n"
+    ) as cached_file:
+        yield {
+            salt.modules.yaml: {
+                "__salt__": {
+                    "config.get": salt.modules.config.get,
+                    "cp.cache_file": MagicMock(
+                        salt.modules.cp.cache_file,
+                        autospec=True,
+                        return_value=str(cached_file),
+                    ),
+                    "slsutil.renderer": MagicMock(
+                        salt.modules.slsutil.renderer,
+                        autospec=True,
+                        return_value=f"key: value{os.linesep}",
+                    ),
+                },
+                "__opts__": minion_opts,
+                "__utils__": {
+                    "files.fopen": salt.utils.files.fopen,
+                    "yamllint.lint": salt.utils.yamllint.lint,
+                },
+            },
+            salt.modules.config: {
+                "__opts__": minion_opts,
+            },
+        }
+
+
+def test_lint_yaml():
+    """
+    ensure that we can lint from the yaml lint utils
+    """
+    assert salt.modules.yaml.lint("salt://test/test.sls") == {
+        "problems": [],
+        "source": f"key:{os.linesep}  value{os.linesep}",
+    }
+
+
+def test_lint_pre_render():
+    assert salt.modules.yaml.lint("salt://test.test.sls", pre_render="jinja") == {
+        "problems": [],
+        "source": f"key: value{os.linesep}",
+    }
+
+
+def test_yamllint_virtual():
+    assert salt.modules.yaml.__virtual__() == "yaml"