diff --git a/tests/system/large/ml/test_decomposition.py b/tests/system/large/ml/test_decomposition.py
index 460f07b816..a7049d4c18 100644
--- a/tests/system/large/ml/test_decomposition.py
+++ b/tests/system/large/ml/test_decomposition.py
@@ -67,8 +67,8 @@ def test_decomposition_configure_fit_score_predict(
         index=pd.Index([1633, 1672, 1690], name="tag_number", dtype="Int64"),
     )
     pd.testing.assert_frame_equal(
-        result.sort_index(),
-        expected,
+        abs(result.sort_index()),  # results may differ by a minus sign
+        abs(expected),
         check_exact=False,
         rtol=0.1,
     )
diff --git a/tests/system/large/ml/test_pipeline.py b/tests/system/large/ml/test_pipeline.py
index 9294740dd6..6874a9f301 100644
--- a/tests/system/large/ml/test_pipeline.py
+++ b/tests/system/large/ml/test_pipeline.py
@@ -431,10 +431,16 @@ def test_pipeline_PCA_fit_score_predict(session, penguins_df_default_index):
         index=pd.Index([1633, 1672, 1690], name="tag_number", dtype="Int64"),
     )
     pd.testing.assert_frame_equal(
-        predictions[
-            ["principal_component_1", "principal_component_2", "principal_component_3"]
-        ],
-        expected,
+        abs(  # results may differ by a minus sign
+            predictions[
+                [
+                    "principal_component_1",
+                    "principal_component_2",
+                    "principal_component_3",
+                ]
+            ]
+        ),
+        abs(expected),
         check_exact=False,
         rtol=0.1,
     )