diff --git a/tests/test_visualization.py b/tests/test_visualization.py
index 83861a3..f7162a6 100644
--- a/tests/test_visualization.py
+++ b/tests/test_visualization.py
@@ -7,6 +7,7 @@
     stack_slices_center,
     generalized_procrustes_analysis,
 )
+from paste2.projection import partial_stack_slices_pairwise, partial_procrustes_analysis
 from pandas.testing import assert_frame_equal
 
 test_dir = Path(__file__).parent
@@ -112,11 +113,11 @@ def test_generalized_procrustes_analysis(slices):
     )
 
     assert_frame_equal(
-        pd.DataFrame(aligned_center, columns=['0', '1']),
+        pd.DataFrame(aligned_center, columns=["0", "1"]),
         pd.read_csv(output_dir / "aligned_center.csv"),
     )
     assert_frame_equal(
-        pd.DataFrame(aligned_slice, columns=['0', '1']),
+        pd.DataFrame(aligned_slice, columns=["0", "1"]),
         pd.read_csv(output_dir / "aligned_slice.csv"),
     )
     expected_theta = 0.0
@@ -144,3 +145,43 @@ def test_generalized_procrustes_analysis(slices):
             equal_nan=True,
         )
     )
+
+
+def test_partial_stack_slices_pairwise(slices):
+    n_slices = len(slices)
+
+    pairwise_info = [
+        np.genfromtxt(input_dir / f"slices_{i}_{i + 1}_pairwise.csv", delimiter=",")
+        for i in range(1, n_slices)
+    ]
+
+    new_slices = partial_stack_slices_pairwise(slices, pairwise_info)
+
+    for i, slice in enumerate(new_slices, start=1):
+        assert_frame_equal(
+            pd.DataFrame(slice.obsm["spatial"], columns=["0", "1"]),
+            pd.read_csv(output_dir / f"aligned_spatial_{i}_{i + 1}.csv"),
+        )
+
+
+def test_partial_procrustes_analysis(slices):
+    center_slice = sc.read_h5ad(input_dir / "center_slice.h5ad")
+
+    pairwise_info = np.genfromtxt(
+        input_dir / "center_slice1_pairwise.csv", delimiter=","
+    )
+
+    aligned_center, aligned_slice = partial_procrustes_analysis(
+        center_slice.obsm["spatial"],
+        slices[0].obsm["spatial"],
+        pairwise_info,
+    )
+
+    assert_frame_equal(
+        pd.DataFrame(aligned_center, columns=["0", "1"]),
+        pd.read_csv(output_dir / "aligned_center.csv"),
+    )
+    assert_frame_equal(
+        pd.DataFrame(aligned_slice, columns=["0", "1"]),
+        pd.read_csv(output_dir / "aligned_slice.csv"),
+    )