diff --git a/openeogeotrellis/integrations/tiffset.py b/openeogeotrellis/integrations/tiffset.py
index c9a7c27e..0f50e43d 100644
--- a/openeogeotrellis/integrations/tiffset.py
+++ b/openeogeotrellis/integrations/tiffset.py
@@ -6,9 +6,9 @@
 
 def embed_gdal_metadata(gdal_metadata_xml: str, geotiff_path: Union[Path, str]):
     # TODO: use gdal instead to avoid warnings or are they harmless?
-    with tempfile.NamedTemporaryFile(prefix="GDALMetadata", suffix=".xml.tmp", mode="wt", encoding="ascii") as tmp:
+    with tempfile.NamedTemporaryFile(prefix="GDALMetadata_", suffix=".xml.tmp", mode="wt", encoding="ascii") as tmp:
         # use temporary file to work around segfault in container
-        tmp.write(gdal_metadata_xml)
+        tmp.write(f"{gdal_metadata_xml}\n")
         tmp.flush()
 
         subprocess.check_call(["tiffset", "-sf", "42112", tmp.name, str(geotiff_path)])
diff --git a/tests/datacube_fixtures.py b/tests/datacube_fixtures.py
index 69f8cba7..3b5e75ee 100644
--- a/tests/datacube_fixtures.py
+++ b/tests/datacube_fixtures.py
@@ -7,19 +7,20 @@
 
 from openeogeotrellis.service_registry import InMemoryServiceRegistry
 
-matrix_of_one = np.zeros((1, 4, 4))
+TILE_SIZE = 16
+
+matrix_of_one = np.zeros((1, TILE_SIZE, TILE_SIZE))
 matrix_of_one.fill(1)
 
-matrix_of_two = np.zeros((1, 4, 4))
+matrix_of_two = np.zeros((1, TILE_SIZE, TILE_SIZE))
 matrix_of_two.fill(2)
 
-matrix_of_nodata = np.zeros((1, 4, 4))
+matrix_of_nodata = np.zeros((1, TILE_SIZE, TILE_SIZE))
 matrix_of_nodata.fill(-1)
 
-extent = {'xmin': 0.0, 'ymin': 0.0, 'xmax': 4.0, 'ymax': 4.0}
-extent_webmerc = {'xmin': 0.0, 'ymin': 0.0, 'xmax': 445277.96317309426, 'ymax': 445640.1096560266}
-layout = {'layoutCols': 1, 'layoutRows': 1, 'tileCols': 4, 'tileRows': 4}
-
+extent = {"xmin": 0.0, "ymin": 0.0, "xmax": 4.0, "ymax": 4.0}
+extent_webmerc = {"xmin": 0.0, "ymin": 0.0, "xmax": 445277.96317309426, "ymax": 445640.1096560266}
+layout = {"layoutCols": 1, "layoutRows": 1, "tileCols": TILE_SIZE, "tileRows": TILE_SIZE}
 
 
 openeo_metadata = {
diff --git a/tests/test_load_collection.py b/tests/test_load_collection.py
index 6c90f492..fcbdaebc 100644
--- a/tests/test_load_collection.py
+++ b/tests/test_load_collection.py
@@ -416,7 +416,7 @@ def test_load_disk_collection_pyramid(
     cube = cube.rename_labels("bands", ["band1", "bands"])
 
     assert len(cube.metadata.spatial_dimensions) == 2
-    assert len(cube.pyramid.levels) == 2
+    assert len(cube.pyramid.levels) == 4
 
 
 def test_load_disk_collection_batch(imagecollection_with_two_bands_and_three_dates,backend_implementation,tmp_path):