diff --git a/dbt/include/global_project/macros/unit_test_sql/get_fixture_sql.sql b/dbt/include/global_project/macros/unit_test_sql/get_fixture_sql.sql
index 385fd73f..882eebdb 100644
--- a/dbt/include/global_project/macros/unit_test_sql/get_fixture_sql.sql
+++ b/dbt/include/global_project/macros/unit_test_sql/get_fixture_sql.sql
@@ -77,15 +77,15 @@ union all
 
         {%- set column_type = column_name_to_data_types[column_name] %}
         
-        {#-- wrap yaml strings in quotes, apply cast --#}
+        {#-- sanitize column_value: wrap yaml strings in quotes, apply cast --#}
+        {%- set column_value_clean = column_value -%}
         {%- if column_value is string -%}
-            {%- set row_update = {column_name: safe_cast(dbt.string_literal(dbt.escape_single_quotes(column_value)), column_type) } -%}
+            {%- set column_value_clean = dbt.string_literal(dbt.escape_single_quotes(column_value)) -%}
         {%- elif column_value is none -%}
-            {%- set row_update = {column_name: safe_cast('null', column_type) } -%}
-        {%- else -%}
-            {%- set row_update = {column_name: safe_cast(column_value, column_type) } -%}
+            {%- set column_value_clean = 'null' } -%}
         {%- endif -%}
 
+        {%- set row_update = {column_name: safe_cast(column_value_clean, column_type) } -%}
         {%- do formatted_row.update(row_update) -%}
     {%- endfor -%}
     {{ return(formatted_row) }}
diff --git a/dbt/tests/adapter/unit_testing/test_case_insensitivity.py b/dbt/tests/adapter/unit_testing/test_case_insensitivity.py
index 84a87c5c..f6f89766 100644
--- a/dbt/tests/adapter/unit_testing/test_case_insensitivity.py
+++ b/dbt/tests/adapter/unit_testing/test_case_insensitivity.py
@@ -1,6 +1,5 @@
 import pytest
 from dbt.tests.util import run_dbt
-from dbt.tests.fixtures.project import *
 
 
 my_model_sql = """
diff --git a/dbt/tests/adapter/unit_testing/test_invalid_input.py b/dbt/tests/adapter/unit_testing/test_invalid_input.py
index a4d5aa6e..6c41ceb9 100644
--- a/dbt/tests/adapter/unit_testing/test_invalid_input.py
+++ b/dbt/tests/adapter/unit_testing/test_invalid_input.py
@@ -1,6 +1,5 @@
 import pytest
 from dbt.tests.util import run_dbt, run_dbt_and_capture
-from dbt.tests.fixtures.project import *
 
 
 my_model_sql = """
diff --git a/dbt/tests/adapter/unit_testing/test_types.py b/dbt/tests/adapter/unit_testing/test_types.py
index 5dc9838c..1d19aafb 100644
--- a/dbt/tests/adapter/unit_testing/test_types.py
+++ b/dbt/tests/adapter/unit_testing/test_types.py
@@ -1,7 +1,6 @@
 import pytest
 
 from dbt.tests.util import write_file, run_dbt
-from dbt.tests.fixtures.project import *
 
 my_model_sql = """
 select