diff --git a/examples/pure-hatch/pyproject.toml b/examples/pure-hatch/pyproject.toml
index f2198b1fc..b0c60cb9b 100644
--- a/examples/pure-hatch/pyproject.toml
+++ b/examples/pure-hatch/pyproject.toml
@@ -47,3 +47,6 @@ select = [
 
 [tool.ruff.isort]
 known-first-party = ["examplePy"]
+
+[tool.pytest.ini_options]
+pythonpath = "src"
diff --git a/examples/pure-hatch/src/examplePy/__init__.py b/examples/pure-hatch/src/examplePy/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/examples/pure-hatch/tests/examplePy/data/temperatures_testdata.csv b/examples/pure-hatch/tests/examplePy/data/temperatures_testdata.csv
new file mode 100644
index 000000000..54d42f27b
--- /dev/null
+++ b/examples/pure-hatch/tests/examplePy/data/temperatures_testdata.csv
@@ -0,0 +1,493 @@
+Year,Month,Temperature
+1980,1,53
+1980,2,59
+1980,3,39
+1980,4,75
+1980,5,51
+1980,6,87
+1980,7,60
+1980,8,28
+1980,9,47
+1980,10,100
+1980,11,59
+1980,12,54
+1981,1,43
+1981,2,92
+1981,3,25
+1981,4,94
+1981,5,52
+1981,6,50
+1981,7,35
+1981,8,78
+1981,9,42
+1981,10,99
+1981,11,26
+1981,12,59
+1982,1,69
+1982,2,7
+1982,3,48
+1982,4,30
+1982,5,72
+1982,6,50
+1982,7,62
+1982,8,51
+1982,9,8
+1982,10,87
+1982,11,66
+1982,12,46
+1983,1,18
+1983,2,29
+1983,3,7
+1983,4,37
+1983,5,11
+1983,6,33
+1983,7,69
+1983,8,21
+1983,9,2
+1983,10,10
+1983,11,1
+1983,12,22
+1984,1,53
+1984,2,19
+1984,3,19
+1984,4,88
+1984,5,16
+1984,6,31
+1984,7,25
+1984,8,1
+1984,9,87
+1984,10,7
+1984,11,3
+1984,12,20
+1985,1,5
+1985,2,77
+1985,3,2
+1985,4,22
+1985,5,98
+1985,6,90
+1985,7,24
+1985,8,96
+1985,9,71
+1985,10,25
+1985,11,60
+1985,12,11
+1986,1,43
+1986,2,73
+1986,3,90
+1986,4,86
+1986,5,57
+1986,6,18
+1986,7,62
+1986,8,43
+1986,9,60
+1986,10,51
+1986,11,62
+1986,12,83
+1987,1,14
+1987,2,18
+1987,3,7
+1987,4,73
+1987,5,22
+1987,6,66
+1987,7,14
+1987,8,61
+1987,9,92
+1987,10,68
+1987,11,20
+1987,12,46
+1988,1,48
+1988,2,47
+1988,3,36
+1988,4,61
+1988,5,73
+1988,6,81
+1988,7,70
+1988,8,46
+1988,9,41
+1988,10,27
+1988,11,53
+1988,12,89
+1989,1,87
+1989,2,63
+1989,3,21
+1989,4,86
+1989,5,19
+1989,6,37
+1989,7,82
+1989,8,47
+1989,9,32
+1989,10,41
+1989,11,28
+1989,12,76
+1990,1,67
+1990,2,45
+1990,3,34
+1990,4,2
+1990,5,69
+1990,6,90
+1990,7,70
+1990,8,38
+1990,9,86
+1990,10,79
+1990,11,48
+1990,12,95
+1991,1,48
+1991,2,63
+1991,3,66
+1991,4,99
+1991,5,19
+1991,6,6
+1991,7,47
+1991,8,52
+1991,9,42
+1991,10,9
+1991,11,67
+1991,12,28
+1992,1,43
+1992,2,100
+1992,3,74
+1992,4,73
+1992,5,27
+1992,6,3
+1992,7,37
+1992,8,91
+1992,9,92
+1992,10,96
+1992,11,57
+1992,12,27
+1993,1,41
+1993,2,60
+1993,3,55
+1993,4,56
+1993,5,67
+1993,6,56
+1993,7,35
+1993,8,95
+1993,9,90
+1993,10,75
+1993,11,65
+1993,12,45
+1994,1,52
+1994,2,15
+1994,3,15
+1994,4,24
+1994,5,80
+1994,6,59
+1994,7,2
+1994,8,46
+1994,9,25
+1994,10,7
+1994,11,7
+1994,12,20
+1995,1,47
+1995,2,7
+1995,3,78
+1995,4,3
+1995,5,98
+1995,6,51
+1995,7,31
+1995,8,41
+1995,9,98
+1995,10,14
+1995,11,95
+1995,12,19
+1996,1,41
+1996,2,72
+1996,3,56
+1996,4,54
+1996,5,51
+1996,6,74
+1996,7,96
+1996,8,10
+1996,9,85
+1996,10,60
+1996,11,11
+1996,12,5
+1997,1,89
+1997,2,20
+1997,3,60
+1997,4,90
+1997,5,60
+1997,6,10
+1997,7,82
+1997,8,27
+1997,9,87
+1997,10,40
+1997,11,87
+1997,12,49
+1998,1,14
+1998,2,4
+1998,3,95
+1998,4,54
+1998,5,45
+1998,6,87
+1998,7,42
+1998,8,79
+1998,9,91
+1998,10,51
+1998,11,26
+1998,12,94
+1999,1,24
+1999,2,96
+1999,3,68
+1999,4,35
+1999,5,20
+1999,6,34
+1999,7,16
+1999,8,19
+1999,9,29
+1999,10,72
+1999,11,45
+1999,12,14
+2000,1,1
+2000,2,77
+2000,3,22
+2000,4,56
+2000,5,95
+2000,6,1
+2000,7,82
+2000,8,73
+2000,9,5
+2000,10,51
+2000,11,70
+2000,12,17
+2001,1,67
+2001,2,0
+2001,3,75
+2001,4,23
+2001,5,24
+2001,6,94
+2001,7,79
+2001,8,55
+2001,9,15
+2001,10,53
+2001,11,39
+2001,12,57
+2002,1,38
+2002,2,65
+2002,3,70
+2002,4,16
+2002,5,87
+2002,6,38
+2002,7,4
+2002,8,37
+2002,9,61
+2002,10,2
+2002,11,96
+2002,12,71
+2003,1,70
+2003,2,95
+2003,3,72
+2003,4,53
+2003,5,9
+2003,6,29
+2003,7,87
+2003,8,0
+2003,9,99
+2003,10,12
+2003,11,53
+2003,12,0
+2004,1,81
+2004,2,17
+2004,3,91
+2004,4,90
+2004,5,95
+2004,6,15
+2004,7,90
+2004,8,45
+2004,9,97
+2004,10,67
+2004,11,9
+2004,12,96
+2005,1,93
+2005,2,65
+2005,3,80
+2005,4,77
+2005,5,61
+2005,6,98
+2005,7,9
+2005,8,58
+2005,9,79
+2005,10,55
+2005,11,51
+2005,12,97
+2006,1,4
+2006,2,71
+2006,3,7
+2006,4,17
+2006,5,76
+2006,6,76
+2006,7,44
+2006,8,77
+2006,9,45
+2006,10,90
+2006,11,5
+2006,12,44
+2007,1,48
+2007,2,89
+2007,3,31
+2007,4,53
+2007,5,11
+2007,6,29
+2007,7,58
+2007,8,10
+2007,9,80
+2007,10,53
+2007,11,19
+2007,12,57
+2008,1,0
+2008,2,57
+2008,3,83
+2008,4,23
+2008,5,11
+2008,6,81
+2008,7,7
+2008,8,59
+2008,9,77
+2008,10,72
+2008,11,62
+2008,12,86
+2009,1,71
+2009,2,35
+2009,3,40
+2009,4,69
+2009,5,75
+2009,6,59
+2009,7,24
+2009,8,27
+2009,9,71
+2009,10,56
+2009,11,22
+2009,12,65
+2010,1,52
+2010,2,63
+2010,3,34
+2010,4,35
+2010,5,38
+2010,6,10
+2010,7,40
+2010,8,65
+2010,9,50
+2010,10,43
+2010,11,93
+2010,12,32
+2011,1,90
+2011,2,65
+2011,3,23
+2011,4,94
+2011,5,23
+2011,6,26
+2011,7,57
+2011,8,67
+2011,9,85
+2011,10,69
+2011,11,93
+2011,12,59
+2012,1,9
+2012,2,85
+2012,3,94
+2012,4,7
+2012,5,77
+2012,6,13
+2012,7,10
+2012,8,47
+2012,9,17
+2012,10,56
+2012,11,87
+2012,12,79
+2013,1,59
+2013,2,41
+2013,3,51
+2013,4,81
+2013,5,90
+2013,6,32
+2013,7,87
+2013,8,63
+2013,9,46
+2013,10,84
+2013,11,17
+2013,12,77
+2014,1,100
+2014,2,35
+2014,3,83
+2014,4,27
+2014,5,89
+2014,6,27
+2014,7,34
+2014,8,20
+2014,9,58
+2014,10,11
+2014,11,70
+2014,12,42
+2015,1,81
+2015,2,21
+2015,3,52
+2015,4,51
+2015,5,12
+2015,6,46
+2015,7,13
+2015,8,46
+2015,9,13
+2015,10,73
+2015,11,98
+2015,12,83
+2016,1,33
+2016,2,68
+2016,3,89
+2016,4,55
+2016,5,81
+2016,6,81
+2016,7,91
+2016,8,33
+2016,9,10
+2016,10,73
+2016,11,96
+2016,12,12
+2017,1,41
+2017,2,74
+2017,3,20
+2017,4,64
+2017,5,56
+2017,6,56
+2017,7,21
+2017,8,15
+2017,9,79
+2017,10,12
+2017,11,20
+2017,12,4
+2018,1,82
+2018,2,90
+2018,3,47
+2018,4,53
+2018,5,99
+2018,6,23
+2018,7,84
+2018,8,18
+2018,9,90
+2018,10,11
+2018,11,31
+2018,12,96
+2019,1,40
+2019,2,5
+2019,3,21
+2019,4,92
+2019,5,73
+2019,6,51
+2019,7,11
+2019,8,22
+2019,9,8
+2019,10,74
+2019,11,52
+2019,12,54
+2020,1,29
+2020,2,87
+2020,3,46
+2020,4,81
+2020,5,27
+2020,6,87
+2020,7,72
+2020,8,46
+2020,9,30
+2020,10,47
+2020,11,49
+2020,12,70
diff --git a/examples/pure-hatch/tests/examplePy/test_temperature.py b/examples/pure-hatch/tests/examplePy/test_temperature.py
new file mode 100644
index 000000000..d6f4cb561
--- /dev/null
+++ b/examples/pure-hatch/tests/examplePy/test_temperature.py
@@ -0,0 +1,59 @@
+"""Pytest-based unit test examples for the temperature module"""
+import math
+
+from examplePy import temperature
+
+
+def test_fahrenheit_to_celsius_positive():
+    """Test F to C calculation for positive values"""
+    value = 95
+    expected_result = 35
+    result = temperature.fahrenheit_to_celsius(value)
+
+    assert result == expected_result
+
+
+def test_fahrenheit_to_celsius_negative():
+    """Test F to C calculation for negative values"""
+    value = -13
+    expected_result = -25
+    result = temperature.fahrenheit_to_celsius(value)
+
+    assert result == expected_result
+
+
+def test_fahrenheit_to_celsius_zero():
+    """Test F to C calculation for zero"""
+    value = 0
+    expected_result = -17.7778
+    result = temperature.fahrenheit_to_celsius(value)
+
+    # Test that the result is close to the expected value, within tolerances
+    assert math.isclose(result, expected_result, abs_tol=0.0001)
+
+
+def test_celsius_to_fahrenheit_positive():
+    """Test C to F calculation for positive values"""
+    value = 100
+    expected_result = 212
+    result = temperature.celsius_to_fahrenheit(value)
+
+    assert result == expected_result
+
+
+def test_celsius_to_fahrenheit_negative():
+    """Test C to F calculation for negative values"""
+    value = -20
+    expected_result = -4
+    result = temperature.celsius_to_fahrenheit(value)
+
+    assert result == expected_result
+
+
+def test_celsius_to_fahrenheit_zero():
+    """Test C to F calculation for zero"""
+    value = 0
+    expected_result = 32
+    result = temperature.celsius_to_fahrenheit(value)
+
+    assert result == expected_result
diff --git a/examples/pure-hatch/tests/examplePy/test_temporal.py b/examples/pure-hatch/tests/examplePy/test_temporal.py
new file mode 100644
index 000000000..85d069e4a
--- /dev/null
+++ b/examples/pure-hatch/tests/examplePy/test_temporal.py
@@ -0,0 +1,44 @@
+"""Pytest-based unit test examples for the temporal module"""
+import pathlib
+
+import numpy
+import pandas
+import pytest
+
+from examplePy import temperature, temporal
+
+# Get the path to the test data directory
+TEST_DATA = pathlib.Path(__file__).parents[0] / "data"
+
+
+@pytest.fixture
+def temperatures():
+    """Pytest fixture for temperature data, used to avoid duplicate code in all of our tests."""
+    filename = TEST_DATA / "temperatures_testdata.csv"
+    df = pandas.read_csv(filename)
+    return df
+
+
+def test_calc_annual_mean(temperatures):
+    """Test the calculation of the annual and total mean temperatures in the data"""
+    expected_mean_1988 = 13.3333
+    expected_mean_final = 10.4347
+
+    # Calculate the means
+    df_mean, df_final = temporal.calc_annual_mean(temperatures)
+
+    # Compare specific means to validate the calculations
+    assert numpy.isclose(
+        df_mean.loc[[1988], "Temperature"].iloc[0], expected_mean_1988)
+    assert numpy.isclose(df_final.loc["Temperature"], expected_mean_final)
+
+
+def test_calc_annual_mean_no_data():
+    """Negative test - test the calculation of the annual and total mean temperatures in the data when given no data results in an empty result"""
+    temperatures = pandas.DataFrame(columns=("Year", "Month", "Temperature"))
+
+    # Calculate the means with no data
+    df_mean, df_final = temporal.calc_annual_mean(temperatures)
+
+    # Verify the result dataframe is empty
+    assert df_mean.empty
diff --git a/package-structure-code/code-style-linting-format.md b/package-structure-code/code-style-linting-format.md
index 7e92c0eed..e41056658 100644
--- a/package-structure-code/code-style-linting-format.md
+++ b/package-structure-code/code-style-linting-format.md
@@ -214,6 +214,7 @@ Depending on your project, you might want to add the following to sort imports c
 :::{literalinclude} ../examples/pure-hatch/pyproject.toml
 :language: toml
 :start-at: [tool.ruff.isort]
+:end-before: [tool.pytest.ini_options]
 :::
 
 ## How to use code formatter in your local workflow
diff --git a/package-structure-code/pyproject-toml-python-package-metadata.md b/package-structure-code/pyproject-toml-python-package-metadata.md
index 46bdd09e7..08d9b5ada 100644
--- a/package-structure-code/pyproject-toml-python-package-metadata.md
+++ b/package-structure-code/pyproject-toml-python-package-metadata.md
@@ -195,6 +195,7 @@ Then specify dependency groups as follows:
 :::{literalinclude} ../examples/pure-hatch/pyproject.toml
 :language: toml
 :start-at: [project.optional-dependencies]
+:end-before: [tool.ruff]
 :::
 
 Following the above example, you install dependencies like this: