diff --git a/xrspatial/tests/general_checks.py b/xrspatial/tests/general_checks.py
index 0638dc3a6..8978249c0 100644
--- a/xrspatial/tests/general_checks.py
+++ b/xrspatial/tests/general_checks.py
@@ -32,7 +32,7 @@ def create_test_raster(
         backend='numpy',
         name='myraster',
         dims=['y', 'x'],
-        attrs={'res': (0.5, 0.5), 'crs': 'EPSG: 5070'},
+        attrs={'res': (0.5, 0.5), 'crs': 'EPSG:5070'},
         chunks=(3, 3)
 ):
     raster = xr.DataArray(data, name=name, dims=dims, attrs=attrs)
diff --git a/xrspatial/tests/test_aspect.py b/xrspatial/tests/test_aspect.py
index 00a32afeb..070661bad 100644
--- a/xrspatial/tests/test_aspect.py
+++ b/xrspatial/tests/test_aspect.py
@@ -271,7 +271,7 @@ def _rectangular_cell_raster(backend='numpy', xres=10.0, yres=1.0):
     data = (X + Y).astype(np.float64)
     return create_test_raster(
         data, backend=backend,
-        attrs={'res': (xres, yres), 'crs': 'EPSG: 5070'})
+        attrs={'res': (xres, yres), 'crs': 'EPSG:5070'})
 
 
 @pytest.mark.parametrize("backend", ['numpy', 'dask+numpy'])
diff --git a/xrspatial/tests/test_contour.py b/xrspatial/tests/test_contour.py
index c3ee0ff35..fc30f2ae5 100644
--- a/xrspatial/tests/test_contour.py
+++ b/xrspatial/tests/test_contour.py
@@ -1052,7 +1052,7 @@ def test_geopandas_crs_from_attrs(self):
         """return_type='geopandas' copies agg.attrs['crs'] onto the gdf."""
         pytest.importorskip("geopandas")
         data = _make_peak()
-        # create_test_raster sets attrs={'res': ..., 'crs': 'EPSG: 5070'}.
+        # create_test_raster sets attrs={'res': ..., 'crs': 'EPSG:5070'}.
         agg = create_test_raster(data, backend='numpy')
         gdf = contours(agg, levels=[1.5], return_type="geopandas")
         # GeoPandas normalizes the CRS; check it resolves to EPSG:5070.
diff --git a/xrspatial/tests/test_multispectral.py b/xrspatial/tests/test_multispectral.py
index f22c0cf8d..10076322b 100644
--- a/xrspatial/tests/test_multispectral.py
+++ b/xrspatial/tests/test_multispectral.py
@@ -891,7 +891,7 @@ def _tc_band(backend):
     data = np.random.default_rng(3429).random((6, 6)).astype(np.float32)
     return create_test_raster(
         data, backend=backend, dims=['lat', 'lon'],
-        attrs={'res': (0.5, 0.5), 'crs': 'EPSG: 5070'},
+        attrs={'res': (0.5, 0.5), 'crs': 'EPSG:5070'},
     )
 
 
diff --git a/xrspatial/tests/test_preview.py b/xrspatial/tests/test_preview.py
index 4c840bfc1..2e6e88523 100644
--- a/xrspatial/tests/test_preview.py
+++ b/xrspatial/tests/test_preview.py
@@ -521,7 +521,7 @@ def test_res_passthrough_unchanged():
 def test_no_res_attr_stays_absent():
     """preview should not invent a res when the input never had one."""
     data = np.random.default_rng(1).random((200, 400)).astype(np.float32)
-    agg = create_test_raster(data, attrs={'crs': 'EPSG: 5070'})
+    agg = create_test_raster(data, attrs={'crs': 'EPSG:5070'})
     assert 'res' not in agg.attrs
     result = preview(agg, width=40)
     assert 'res' not in result.attrs