one more test

tests/functional/defer_state/fixtures.py

@@ -613,6 +613,15 @@
       - name: customers
 """
 
+schema_source_with_updated_env_var_as_schema_property_yml = """
+sources:
+  - name: jaffle_shop
+    database: "test"
+    schema: "updated"
+    tables:
+      - name: customers
+"""
+
 schema_source_with_jinja_as_database_property_yml = """
 sources:
   - name: jaffle_shop

tests/functional/defer_state/test_modified_state_sources_unrendered.py

@@ -1,3 +1,5 @@
+import os
+
 import pytest
 
 from dbt.tests.util import get_artifact, run_dbt, write_file
@@ -6,6 +8,7 @@
     schema_source_with_env_var_as_schema_property_yml,
     schema_source_with_jinja_as_database_property_yml,
     schema_source_with_jinja_as_schema_property_yml,
+    schema_source_with_updated_env_var_as_schema_property_yml,
     schema_source_with_updated_jinja_as_database_property_yml,
     schema_source_with_updated_jinja_as_schema_property_yml,
 )
@@ -30,6 +33,53 @@ def models(self):
             "schema.yml": schema_source_with_env_var_as_schema_property_yml,
         }
 
+    def test_change_env_var(self, project):
+        # Generate ./state without changing environment variable value
+        run_dbt(["run"])
+        self.copy_state()
+
+        manifest_json = get_artifact(project.project_root, "target", "manifest.json")
+        assert manifest_json["sources"]["source.test.jaffle_shop.customers"]["schema"] == "table"
+        assert (
+            manifest_json["sources"]["source.test.jaffle_shop.customers"]["unrendered_schema"]
+            == "{{ env_var('DBT_TEST_STATE_MODIFIED') }}"
+        )
+
+        # Assert no false positive
+        results = run_dbt(["list", "-s", "state:modified", "--state", "./state"])
+        assert len(results) == 0
+
+        # Change environment variable and assert no false positive
+        # Environment variables do not have an effect on state:modified
+        os.environ["DBT_TEST_STATE_MODIFIED"] = "view"
+        results = run_dbt(["list", "-s", "state:modified", "--state", "./state"])
+        assert len(results) == 0
+
+        # Confirm env change changed schema, but not unrendered_schema
+        manifest_json = get_artifact(project.project_root, "target", "manifest.json")
+        assert manifest_json["sources"]["source.test.jaffle_shop.customers"]["schema"] == "view"
+        assert (
+            manifest_json["sources"]["source.test.jaffle_shop.customers"]["unrendered_schema"]
+            == "{{ env_var('DBT_TEST_STATE_MODIFIED') }}"
+        )
+
+        # Assert no false negative after actual change to schema
+        write_file(
+            schema_source_with_updated_env_var_as_schema_property_yml,
+            project.project_root,
+            "models",
+            "schema.yml",
+        )
+        results = run_dbt(["list", "-s", "state:modified", "--state", "./state"])
+        assert len(results) == 1
+
+        manifest_json = get_artifact(project.project_root, "target", "manifest.json")
+        assert manifest_json["sources"]["source.test.jaffle_shop.customers"]["schema"] == "updated"
+        assert (
+            manifest_json["sources"]["source.test.jaffle_shop.customers"]["unrendered_schema"]
+            == "updated"
+        )
+
 
 class TestSourceNodeWithJinjaInDatabase(BaseModifiedState):
     @pytest.fixture(scope="class")