diff --git a/tests/test_forward_link.py b/tests/test_forward_link.py
index d1c0f6cf..74e32005 100644
--- a/tests/test_forward_link.py
+++ b/tests/test_forward_link.py
@@ -1,150 +1,8 @@
-import numpy as np
-import pandas as pd
 import pytest
 from helper_functions import load_and_format
-from pandas.testing import assert_frame_equal, assert_series_equal
-
-from src.forward_link import calculate_imputation_link, mask_values
-
-
-class TestFilters:
-    # based on 02_C_FI_input
-    df = pd.DataFrame(
-        data={
-            "identifier": [20001, 20001, 20002, 20002, 20003, 20003, 20004, 20004],
-            "date": [202001, 202002, 202001, 202002, 202001, 202002, 202001, 202002],
-            "group": [100, 100, 100, 100, 100, 100, 100, 100],
-            "question": [2536.0, 8283.0, 9113.0, 2970.0, 5644.0, 989.0, np.nan, np.nan],
-            "other": [35, 35, 72, 72, 77, 77, 30, 30],
-        }
-    )
-
-    def test_basic_filter(self):
-        """Test a basic filter, filters questions with identifier different to 20001"""
-
-        expected = pd.DataFrame(
-            data={
-                "identifier": [20001, 20001, 20002, 20002, 20003, 20003, 20004, 20004],
-                "date": [
-                    202001,
-                    202002,
-                    202001,
-                    202002,
-                    202001,
-                    202002,
-                    202001,
-                    202002,
-                ],
-                "group": [100, 100, 100, 100, 100, 100, 100, 100],
-                "question": [0, 0, 9113.0, 2970.0, 5644.0, 989.0, np.nan, np.nan],
-                "other": [35, 35, 72, 72, 77, 77, 30, 30],
-            }
-        )
-
-        link_filter = "identifier != '20001'"
-
-        df_copy = self.df.copy()
-
-        mask_values(df_copy, "question", link_filter)
-
-        assert_frame_equal(df_copy, expected)
-
-    def test_basic_multiple_columns(self):
-        """Test a basic filter in more than 1 column"""
-
-        expected = pd.DataFrame(
-            data={
-                "identifier": [20001, 20001, 20002, 20002, 20003, 20003, 20004, 20004],
-                "date": [
-                    202001,
-                    202002,
-                    202001,
-                    202002,
-                    202001,
-                    202002,
-                    202001,
-                    202002,
-                ],
-                "group": [100, 100, 100, 100, 100, 100, 100, 100],
-                "question": [0, 0, 9113.0, 2970.0, 5644.0, 989.0, np.nan, np.nan],
-                "other": [0, 0, 72, 72, 77, 77, 30, 30],
-            }
-        )
-
-        link_filter = "identifier != '20001'"
-
-        df_copy = self.df.copy()
-
-        mask_values(df_copy, ["question", "other"], link_filter)
-
-        assert_frame_equal(df_copy, expected)
-
-    def test_basic_multiple_values(self):
-        """
-        Test a filter in multiple values, filters questions which aren't
-        in ('20001', '20002')
-        """
-
-        expected = pd.DataFrame(
-            data={
-                "identifier": [20001, 20001, 20002, 20002, 20003, 20003, 20004, 20004],
-                "date": [
-                    202001,
-                    202002,
-                    202001,
-                    202002,
-                    202001,
-                    202002,
-                    202001,
-                    202002,
-                ],
-                "group": [100, 100, 100, 100, 100, 100, 100, 100],
-                "question": [0, 0, 0, 0, 5644.0, 989.0, np.nan, np.nan],
-                "other": [35, 35, 72, 72, 77, 77, 30, 30],
-            }
-        )
-
-        link_filter = "identifier not in ('20001', '20002')"
-
-        df_copy = self.df.copy()
-
-        mask_values(df_copy, "question", link_filter)
-
-        assert_frame_equal(df_copy, expected)
-
-    def test_multiple_filters(self):
-        """
-        Test multiple conditions, filters questions which aren't in date 202001
-        and identifier in 20001 in the same time
-        """
-
-        expected = pd.DataFrame(
-            data={
-                "identifier": [20001, 20001, 20002, 20002, 20003, 20003, 20004, 20004],
-                "date": [
-                    202001,
-                    202002,
-                    202001,
-                    202002,
-                    202001,
-                    202002,
-                    202001,
-                    202002,
-                ],
-                "group": [100, 100, 100, 100, 100, 100, 100, 100],
-                "question": [0, 8283.0, 9113.0, 2970.0, 5644.0, 989.0, np.nan, np.nan],
-                "other": [35, 35, 72, 72, 77, 77, 30, 30],
-            }
-        )
-
-        link_filter = "not(date == '202001' and identifier in ('20001'))"
-
-        df_copy = self.df.copy()
-
-        mask_values(df_copy, "question", link_filter)
-
-        assert_frame_equal(df_copy, expected)
+from pandas.testing import assert_series_equal
 
+from src.forward_link import calculate_imputation_link
 
 scenarios = ["calculate_links_test_data"]