diff --git a/tests/src/python/raster_provider_test_base.py b/tests/src/python/raster_provider_test_base.py
index 131611efd84..e6f4796193d 100644
--- a/tests/src/python/raster_provider_test_base.py
+++ b/tests/src/python/raster_provider_test_base.py
@@ -22,7 +22,7 @@ class RasterProviderTestCase:
         Test property values for a provider which does not have the
         fixed size capability
         """
-        l = self.get_layer("fixed_size")
+        l = self.get_layer("not_fixed_size")
         if l.dataProvider().capabilities() & Qgis.RasterInterfaceCapability.Size:
             return
 
@@ -33,6 +33,23 @@ class RasterProviderTestCase:
         self.assertEqual(l.rasterUnitsPerPixelX(), 1)
         self.assertEqual(l.rasterUnitsPerPixelY(), 1)
 
+    def test_fixed_size_provider(self):
+        """
+        Test property values for a provider which does has the
+        fixed size capability
+        """
+        l = self.get_layer("fixed_size")
+        if not l.dataProvider().capabilities() & Qgis.RasterInterfaceCapability.Size:
+            return
+
+        # TODO -- adjust these values after we've got a generic "reference" fixed size
+        # raster which is appropriate for these tests
+        self.assertEqual(l.width(), 3)
+        self.assertEqual(l.height(), 4)
+        # and 1 for raster units per pixel
+        self.assertAlmostEqual(l.rasterUnitsPerPixelX(), 0.000642531091049392, 8)
+        self.assertAlmostEqual(l.rasterUnitsPerPixelY(), 0.00048366498497820487, 8)
+
     def test_provider_clone(self):
         """
         Test that cloning layer works
diff --git a/tests/src/python/test_provider_gdal.py b/tests/src/python/test_provider_gdal.py
index 40c17ef9f77..a9f75844205 100644
--- a/tests/src/python/test_provider_gdal.py
+++ b/tests/src/python/test_provider_gdal.py
@@ -27,6 +27,7 @@ import unittest
 from qgis.testing import start_app, QgisTestCase
 
 from utilities import unitTestDataPath
+from raster_provider_test_base import RasterProviderTestCase
 
 start_app()
 TEST_DATA_DIR = unitTestDataPath()
@@ -36,7 +37,12 @@ def GDAL_COMPUTE_VERSION(maj, min, rev):
     return (maj) * 1000000 + (min) * 10000 + (rev) * 100
 
 
-class PyQgsGdalProvider(QgisTestCase):
+class PyQgsGdalProvider(QgisTestCase, RasterProviderTestCase):
+
+    def get_layer(self, test_id: str) -> QgsRasterLayer:
+        return QgsRasterLayer(
+            self.get_test_data_path("landsat_4326.tif").as_posix(), test_id
+        )
 
     def checkBlockContents(self, block, expected):
         res = []