diff --git a/tests/geophires_x_client_tests/test_geophires_input_parameters.py b/tests/geophires_x_client_tests/test_geophires_input_parameters.py
index ec807129..dc8f926a 100644
--- a/tests/geophires_x_client_tests/test_geophires_input_parameters.py
+++ b/tests/geophires_x_client_tests/test_geophires_input_parameters.py
@@ -2,8 +2,8 @@
 import uuid
 from pathlib import Path
 
-from base_test_case import BaseTestCase
 from geophires_x_client import GeophiresInputParameters
+from tests.base_test_case import BaseTestCase
 
 
 class GeophiresInputParametersTestCase(BaseTestCase):
diff --git a/tests/geophires_x_tests/test_cylindrical_reservoir.py b/tests/geophires_x_tests/test_cylindrical_reservoir.py
index 9a999d46..2e17aad5 100644
--- a/tests/geophires_x_tests/test_cylindrical_reservoir.py
+++ b/tests/geophires_x_tests/test_cylindrical_reservoir.py
@@ -2,7 +2,7 @@
 import unittest
 from pathlib import Path
 
-from base_test_case import BaseTestCase
+from tests.base_test_case import BaseTestCase
 
 # Ruff disabled because imports are order-dependent
 # ruff: noqa: I001
diff --git a/tests/geophires_x_tests/test_economics.py b/tests/geophires_x_tests/test_economics.py
index 6439de1f..d6db574e 100644
--- a/tests/geophires_x_tests/test_economics.py
+++ b/tests/geophires_x_tests/test_economics.py
@@ -1,5 +1,5 @@
-from base_test_case import BaseTestCase
 from geophires_x.Economics import CalculateFinancialPerformance
+from tests.base_test_case import BaseTestCase
 
 
 class EconomicsTestCase(BaseTestCase):
diff --git a/tests/geophires_x_tests/test_reservoir.py b/tests/geophires_x_tests/test_reservoir.py
index 5a50543f..119e73f6 100644
--- a/tests/geophires_x_tests/test_reservoir.py
+++ b/tests/geophires_x_tests/test_reservoir.py
@@ -4,10 +4,10 @@
 
 from pint.facets.plain import PlainQuantity
 
-from base_test_case import BaseTestCase
 from geophires_x.GeoPHIRESUtils import static_pressure_MPa
 from geophires_x.Model import Model
 from geophires_x.Reservoir import Reservoir
+from tests.base_test_case import BaseTestCase
 
 
 class ReservoirTestCase(BaseTestCase):
diff --git a/tests/test_base_test_case.py b/tests/test_base_test_case.py
index 77aaa1b4..2b89990e 100644
--- a/tests/test_base_test_case.py
+++ b/tests/test_base_test_case.py
@@ -1,6 +1,6 @@
 import unittest
 
-from base_test_case import BaseTestCase
+from tests.base_test_case import BaseTestCase
 
 
 class TestBaseTestCase(BaseTestCase):
diff --git a/tests/test_parameter.py b/tests/test_parameter.py
index 6c765ff9..33c8f333 100644
--- a/tests/test_parameter.py
+++ b/tests/test_parameter.py
@@ -3,7 +3,6 @@
 import unittest
 from pathlib import Path
 
-from base_test_case import BaseTestCase
 from geophires_x.Model import Model
 from geophires_x.Parameter import OutputParameter
 from geophires_x.Parameter import Parameter
@@ -14,6 +13,7 @@
 from geophires_x.Units import LengthUnit
 from geophires_x.Units import PressureUnit
 from geophires_x.Units import Units
+from tests.base_test_case import BaseTestCase
 
 
 class ParameterTestCase(BaseTestCase):