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diff --git a/ice_validator/tests/test_nested_template_parameters.py b/ice_validator/tests/test_nested_template_parameters.py
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+++ b/ice_validator/tests/test_nested_template_parameters.py
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+# -*- coding: utf8 -*-
+# ============LICENSE_START====================================================
+# org.onap.vvp/validation-scripts
+# ===================================================================
+# Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+# ===================================================================
+#
+# Unless otherwise specified, all software contained herein is licensed
+# under the Apache License, Version 2.0 (the "License");
+# you may not use this software except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#             http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+#
+#
+# Unless otherwise specified, all documentation contained herein is licensed
+# under the Creative Commons License, Attribution 4.0 Intl. (the "License");
+# you may not use this documentation except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#             https://creativecommons.org/licenses/by/4.0/
+#
+# Unless required by applicable law or agreed to in writing, documentation
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# ============LICENSE_END============================================
+#
+# ECOMP is a trademark and service mark of AT&T Intellectual Property.
+#
+
+"""nested template parameters
+"""
+import os.path
+
+import pytest
+
+from .structures import Heat
+from .helpers import validates
+from .utils import nested_files
+
+VERSION = "1.2.0"
+
+
+def validate_parms(dirname, basename, nested, nested_props, prop_type):
+    """ensure all parms are props
+    return list of errors.
+    """
+    bad = []
+    for rid, nested_filename in nested.items():
+        nested_filepath = os.path.join(dirname, nested_filename)
+        nested_heat = Heat(filepath=nested_filepath)
+        parms = set(nested_heat.parameters.keys())
+        props = nested_props.get(rid, set())
+        missing = parms - props
+        if missing:
+            bad.append(
+                "%s parameters %s missing as %s"
+                " of %s resource %s"
+                % (nested_filename, list(missing), prop_type, basename, rid)
+            )
+    return bad
+
+
+@validates("R-11041")
+def test_nested_template_parameters(heat_template):
+    """
+    All parameters defined in a VNFs Nested YAML file
+    **MUST** be passed in as properties of the resource calling
+    the nested yaml file.
+    """
+    dirname, basename = os.path.split(heat_template)
+    heat = Heat(filepath=heat_template)
+    if not heat.resources:
+        pytest.skip("No resources found")
+    nested_type = nested_files.get_type_nested_files(heat.yml, dirname)
+    nested_resourcegroup = nested_files.get_resourcegroup_nested_files(
+        heat.yml, dirname
+    )
+    if not nested_type and not nested_resourcegroup:
+        pytest.skip("No nested files")
+    bad = []
+    nested_type_props = {
+        rid: set(heat.resources[rid].get("properties", {}).keys())
+        for rid in nested_type
+    }
+    nested_resourcegroup_props = {
+        rid: set(
+            heat.nested_get(
+                heat.resources[rid],
+                "properties",
+                "resource_def",
+                "properties",
+                default={},
+            ).keys()
+        )
+        for rid in nested_resourcegroup
+    }
+    bad.extend(
+        validate_parms(dirname, basename, nested_type, nested_type_props, "properties")
+    )
+    bad.extend(
+        validate_parms(
+            dirname,
+            basename,
+            nested_resourcegroup,
+            nested_resourcegroup_props,
+            "resource_def.properties",
+        )
+    )
+    assert not bad, "; ".join(bad)