diff --git a/gradgpad/tools/__init__.py b/gradgpad/tools/__init__.py
index b447941..8ed9872 100644
--- a/gradgpad/tools/__init__.py
+++ b/gradgpad/tools/__init__.py
@@ -1,5 +1,5 @@
 from gradgpad.foundations.metrics.metric import *  # noqa
 
-from .create_dataframe import *  # noqa
+# from .create_dataframe import *  # noqa
 from .group_dataframe import *  # noqa
 from .open_result_json import *  # noqa
diff --git a/gradgpad/tools/create_dataframe.py b/gradgpad/tools/create_dataframe.py
index 1857381..a289be9 100644
--- a/gradgpad/tools/create_dataframe.py
+++ b/gradgpad/tools/create_dataframe.py
@@ -1,14 +1,14 @@
-import pandas as pd
-
-
-def create_dataframe(metric_retriever, results):
-
-    data = {"Metric": [], "Error Rate (%)": [], "Protocol": []}
-
-    for protocol_name, performance_info in sorted(results.items()):
-        metric, value = metric_retriever(performance_info)
-        data["Metric"].append(metric)
-        data["Error Rate (%)"].append(value)
-        data["Protocol"].append(protocol_name)
-    df = pd.DataFrame(data, columns=list(data.keys()))
-    return df
+# import pandas as pd
+#
+#
+# def create_dataframe(metric_retriever, results):
+#
+#     data = {"Metric": [], "Error Rate (%)": [], "Protocol": []}
+#
+#     for protocol_name, performance_info in sorted(results.items()):
+#         metric, value = metric_retriever(performance_info)
+#         data["Metric"].append(metric)
+#         data["Error Rate (%)"].append(value)
+#         data["Protocol"].append(protocol_name)
+#     df = pd.DataFrame(data, columns=list(data.keys()))
+#     return df
diff --git a/gradgpad/tools/visualization/histogram/histogram_plotter.py b/gradgpad/tools/visualization/histogram/histogram_plotter.py
index c08271d..759e66d 100755
--- a/gradgpad/tools/visualization/histogram/histogram_plotter.py
+++ b/gradgpad/tools/visualization/histogram/histogram_plotter.py
@@ -240,9 +240,7 @@ def save(self, output_filename: str, scores: Scores):
 
         if not os.path.isdir(os.path.dirname(output_filename)):
             raise IOError(
-                "Output path [{}] does not exist".format(
-                    os.path.dirname(output_filename)
-                )
+                f"Output path [{os.path.dirname(output_filename)}] does not exist"
             )
 
         plt = self.create_figure(scores)
diff --git a/tests/unit/foundations/scores/test_scores.py b/tests/unit/foundations/scores/test_scores.py
index 2d11edf..ce378c0 100644
--- a/tests/unit/foundations/scores/test_scores.py
+++ b/tests/unit/foundations/scores/test_scores.py
@@ -116,3 +116,35 @@ def test_should_load_scores_with_fair_skin_tone_subset(scores):
     fair_skin_tone_subset = scores.get_fair_skin_tone_subset()
     for skin_tone in SkinTone.options():
         assert len(fair_skin_tone_subset.get(skin_tone.name)) == 34  # 113
+
+
+@pytest.mark.unit
+@pytest.mark.parametrize("scores", scores_approaches_test)
+def test_should_load_scores_filter_with_random_values(scores):
+    assert len(scores.filtered_by(Filter(random_values=10))) == 10
+
+
+@pytest.mark.unit
+@pytest.mark.parametrize("scores", scores_approaches_test)
+def test_should_load_scores_filter_with_pseudo_random_values(scores):
+    assert len(scores.filtered_by(Filter(pseudo_random_values=10))) == 10
+
+
+@pytest.mark.unit
+@pytest.mark.parametrize("scores", scores_approaches_test)
+def test_should_load_scores_get_genuine(scores):
+    assert len(scores.get_genuine()) == 2281
+
+
+@pytest.mark.unit
+@pytest.mark.parametrize("scores", scores_approaches_test)
+def test_should_load_scores_get_attacks(scores):
+    assert len(scores.get_attacks()) == 10209
+
+
+@pytest.mark.unit
+@pytest.mark.parametrize("scores", scores_approaches_test)
+def test_should_load_scores_get_numpy_scores_and_labels_filtered_by_labels(scores):
+    scores, labels = scores.get_numpy_scores_and_labels_filtered_by_labels()
+    assert len(scores) == 12490
+    assert len(labels) == 12490
diff --git a/tests/unit/foundations/scores/test_scores_provider.py b/tests/unit/foundations/scores/test_scores_provider.py
index 7c30674..b4a76e6 100644
--- a/tests/unit/foundations/scores/test_scores_provider.py
+++ b/tests/unit/foundations/scores/test_scores_provider.py
@@ -11,6 +11,12 @@
 )
 
 
+@pytest.mark.unit
+def test_should_success_get_all_scores_auxiliary():
+    scores = ScoresProvider.all(Approach.AUXILIARY)
+    assert len(scores.keys()) == 35
+
+
 @pytest.mark.unit
 @pytest.mark.parametrize(
     "approach,protocol,subset,expected_scores_length",
diff --git a/tests/unit/tools/visualization/histogram/test_histogram_plotter.py b/tests/unit/tools/visualization/histogram/test_histogram_plotter.py
new file mode 100644
index 0000000..9fd5a92
--- /dev/null
+++ b/tests/unit/tools/visualization/histogram/test_histogram_plotter.py
@@ -0,0 +1,38 @@
+import os
+
+import pytest
+
+from gradgpad import (
+    Approach,
+    HistogramPlotter,
+    Protocol,
+    ScoresProvider,
+    SplitByLabelMode,
+    Subset,
+)
+
+
+@pytest.mark.unit
+@pytest.mark.parametrize("split_by_label_mode", SplitByLabelMode.options_for_curves())
+def test_should_save_a_histogram_plotter(split_by_label_mode: SplitByLabelMode):
+    os.makedirs("output", exist_ok=True)
+    output_filename = "output/radar.png"
+    scores = ScoresProvider.get(Approach.AUXILIARY, Protocol.GRANDTEST, Subset.TEST)
+    plotter = HistogramPlotter(
+        title="My Title",
+        split_by_label_mode=split_by_label_mode,
+    )
+    plotter.save(output_filename=output_filename, scores=scores)
+    assert os.path.isfile(output_filename)
+
+
+@pytest.mark.unit
+def test_should_raise_a_io_error_when_save_a_histogram_plotter_with_no_valid_output_filename():
+    plotter = HistogramPlotter(
+        title="My Title",
+        split_by_label_mode=SplitByLabelMode.DATASET,
+    )
+    pytest.raises(
+        IOError,
+        lambda: plotter.save(output_filename="not_valid_folder/name", scores=None),
+    )
diff --git a/tests/unit/tools/visualization/radar/test_fine_grained_pais_provider.py b/tests/unit/tools/visualization/radar/test_fine_grained_pais_provider.py
new file mode 100644
index 0000000..75ead84
--- /dev/null
+++ b/tests/unit/tools/visualization/radar/test_fine_grained_pais_provider.py
@@ -0,0 +1,9 @@
+import pytest
+
+from gradgpad import CombinedScenario, FineGrainedPaisProvider
+
+
+@pytest.mark.unit
+@pytest.mark.parametrize("combined_scenario", CombinedScenario.options())
+def test_should_get_fine_grained_pais_provider(combined_scenario: CombinedScenario):
+    FineGrainedPaisProvider.by(combined_scenario)