diff --git a/plugins/postgres/dbt/adapters/postgres/column.py b/plugins/postgres/dbt/adapters/postgres/column.py
index 1a312f9cf88..8b4343e5fc0 100644
--- a/plugins/postgres/dbt/adapters/postgres/column.py
+++ b/plugins/postgres/dbt/adapters/postgres/column.py
@@ -2,7 +2,12 @@
 
 
 class PostgresColumn(Column):
-    _DTYPE_ARRAY_TO_DATA_TYPE = {"stringarray": "text[]"}
+    _DTYPE_TO_DATA_TYPE = {
+        "stringarray": "text[]",
+        "integerarray": "int[]",
+        "datetime": "timestamp",
+        "datetimetz": "timestamptz",
+    }
 
     @property
     def data_type(self):
@@ -12,7 +17,7 @@ def data_type(self):
         ):
             return self.dtype
 
-        if self.dtype.lower() in self._DTYPE_ARRAY_TO_DATA_TYPE:
-            return self._DTYPE_ARRAY_TO_DATA_TYPE[self.dtype.lower()]
+        if self.dtype.lower() in self._DTYPE_TO_DATA_TYPE:
+            return self._DTYPE_TO_DATA_TYPE[self.dtype.lower()]
 
         return super().data_type
diff --git a/tests/adapter/dbt/tests/adapter/unit_testing/test_unit_testing_types.py b/tests/adapter/dbt/tests/adapter/unit_testing/test_unit_testing_types.py
new file mode 100644
index 00000000000..ef05735b496
--- /dev/null
+++ b/tests/adapter/dbt/tests/adapter/unit_testing/test_unit_testing_types.py
@@ -0,0 +1,82 @@
+import pytest
+
+from dbt.tests.util import write_file, run_dbt
+
+
+my_model_sql = """
+select
+    tested_column from {{ ref('my_upstream_model')}}
+"""
+
+my_upstream_model_sql = """
+select
+  {sql_value} as tested_column
+"""
+
+test_my_model_yml = """
+unit_tests:
+  - name: test_my_model
+    model: my_model
+    given:
+      - input: ref('my_upstream_model')
+        rows:
+          - {{ tested_column: {yaml_value} }}
+    expect:
+      rows:
+        - {{ tested_column: {yaml_value} }}
+"""
+
+
+class BaseUnitTestingTypes:
+    @pytest.fixture
+    def data_types(self):
+        # sql_value, yaml_value
+        return [
+            ["1", "1"],
+            ["'1'", "1"],
+            ["true", "true"],
+            ["DATE '2020-01-02'", "2020-01-02"],
+            ["TIMESTAMP '2013-11-03 00:00:00-0'", "2013-11-03 00:00:00-0"],
+            ["TIMESTAMPTZ '2013-11-03 00:00:00-0'", "2013-11-03 00:00:00-0"],
+            ["ARRAY['a','b','c']", """'{"a", "b", "c"}'"""],
+            ["ARRAY[1,2,3]", """'{1, 2, 3}'"""],
+            ["'1'::numeric", "1"],
+            [
+                """'{"bar": "baz", "balance": 7.77, "active": false}'::json""",
+                """'{"bar": "baz", "balance": 7.77, "active": false}'""",
+            ],
+        ]
+
+    @pytest.fixture(scope="class")
+    def models(self):
+        return {
+            "my_model.sql": my_model_sql,
+            "my_upstream_model.sql": my_upstream_model_sql,
+            "schema.yml": test_my_model_yml,
+        }
+
+
+class TestUnitTestingTypes(BaseUnitTestingTypes):
+    def test_unit_test_data_type(self, project, data_types):
+        for (sql_value, yaml_value) in data_types:
+            # Write parametrized type value to sql files
+            write_file(
+                my_upstream_model_sql.format(sql_value=sql_value),
+                "models",
+                "my_upstream_model.sql",
+            )
+
+            # Write parametrized type value to unit test yaml definition
+            write_file(
+                test_my_model_yml.format(yaml_value=yaml_value),
+                "models",
+                "schema.yml",
+            )
+
+            results = run_dbt(["run", "--select", "my_upstream_model"])
+            assert len(results) == 1
+
+            try:
+                run_dbt(["unit-test", "--select", "my_model"])
+            except Exception:
+                raise AssertionError(f"unit test failed when testing model with {sql_value}")