diff --git a/src/cifkit/data/ErCoIn/error_others/Er10Co9In20.cif b/src/cifkit/data/ErCoIn/Er10Co9In20.cif
similarity index 100%
rename from src/cifkit/data/ErCoIn/error_others/Er10Co9In20.cif
rename to src/cifkit/data/ErCoIn/Er10Co9In20.cif
diff --git a/src/cifkit/data/ErCoIn/error_others/Er5In3.cif b/src/cifkit/data/ErCoIn/Er5In3.cif
similarity index 100%
rename from src/cifkit/data/ErCoIn/error_others/Er5In3.cif
rename to src/cifkit/data/ErCoIn/Er5In3.cif
diff --git a/src/cifkit/data/ErCoIn/error_others/ErCoIn5.cif b/src/cifkit/data/ErCoIn/ErCoIn5.cif
similarity index 100%
rename from src/cifkit/data/ErCoIn/error_others/ErCoIn5.cif
rename to src/cifkit/data/ErCoIn/ErCoIn5.cif
diff --git a/src/cifkit/data/radius.py b/src/cifkit/data/radius.py
index 2a41de6..359e4a1 100644
--- a/src/cifkit/data/radius.py
+++ b/src/cifkit/data/radius.py
@@ -40,8 +40,41 @@ def get_radius_data() -> dict:
         "Mo": [1.362, 1.386],
         "Hf": [1.5635, 1.585],
         "Ta": [1.430, 1.457],
+        "Ag": [1.443, 1.442],
+        "As": [1.247, 1.39],
+        "Au": [1.435, 1.439],
+        "B": [0.807, 0.98],
+        "Ba": [1.994, 2.215],
+        "Be": [1.072, 1.123],
+        "Bi": [1.53, 1.7],
+        "C": [0.76, 0.914],
+        "Ca": [1.716, 1.97],
+        "Cd": [1.49, 1.543],
+        "Cr": [1.204, 1.357],
+        "Cs": [1.894, 2.67],
+        "Cu": [1.275, 1.276],
+        "Hg": [1.45, 1.57],
+        "K": [1.823, 2.349],
+        "Li": [1.488, 1.549],
+        "Mg": [1.587, 1.598],
+        "Mn": [1.164, 1.306],
+        "Na": [1.662, 1.896],
+        "Nb": [1.426, 1.456],
+        "P": [1.123, 1.28],
+        "Pb": [1.725, 1.746],
+        "Rb": [1.781, 2.48],
+        "Re": [1.345, 1.373],
+        "S": [1.074, 1.27],
+        "Se": [1.237, 1.4],
+        "Sr": [1.977, 2.148],
+        "Te": [1.417, 1.6],
+        "Ti": [1.406, 1.467],
+        "Tl": [1.663, 1.712],
+        "V": [1.307, 1.338],
+        "W": [1.364, 1.394],
+        "Zn": [1.333, 1.379],
+        "Zr": [1.553, 1.597],
     }
-
     data: dict = {
         k: {"CIF_radius": v[0], "Pauling_radius_CN12": v[1]}
         for k, v in rad_data.items()
diff --git a/src/cifkit/utils/cif_parser.py b/src/cifkit/utils/cif_parser.py
index e642435..28d338d 100644
--- a/src/cifkit/utils/cif_parser.py
+++ b/src/cifkit/utils/cif_parser.py
@@ -309,7 +309,7 @@ def get_tag_from_third_line(file_path: str, db_source="PCD") -> str:
         if len(parts) > 1:
             return "_".join(parts[1:])
         else:
-            return None
+            return ""
 
 
 def parse_atom_site_occupancy_info(file_path: str) -> dict:
@@ -373,6 +373,8 @@ def check_unique_atom_site_labels(file_path: str):
 
     # Check how many unique labels - use _atom_site_label of length 4
     label_count = len(loop_values[0])
+    if len(loop_values) == 0:
+        raise ValueError(CifParserError.MISSING_LOOP_VALUES.value)
 
     unique_site_labels = set()
 
diff --git a/src/cifkit/utils/error_messages.py b/src/cifkit/utils/error_messages.py
index 068d6b1..8112c47 100644
--- a/src/cifkit/utils/error_messages.py
+++ b/src/cifkit/utils/error_messages.py
@@ -18,7 +18,6 @@ class CifParserError(Enum):
     INVALID_LOOP_TAGS = (
         "The returned loop tags do not match the expected tags."
     )
-    WRONG_LOOP_VALUE_COUNT = "Wrong number of values in loop _atom_site_*"
     DUPLICATE_LABELS = "The file contains duplicate atom site labels."
     INVALID_PARSED_ELEMENT = (
         "The element was not correctly parsed from the site label."
@@ -27,7 +26,7 @@ class CifParserError(Enum):
         "An error occurred while processing symmetry operation"
     )
     MISSING_COORDINATES = "Missing atomic coordinates"
-    MISSING_LOOP_VALUES = "not enough values to unpack"
+    MISSING_LOOP_VALUES = "Wrong number of values in loop"
 
 
 class FileError(Enum):
diff --git a/tests/core/data/test_radius_handler.py b/tests/core/data/test_radius_handler.py
index 12f3407..66b6c44 100644
--- a/tests/core/data/test_radius_handler.py
+++ b/tests/core/data/test_radius_handler.py
@@ -42,7 +42,6 @@ def test_compute_radius_sum(radius_data_URhIn, radius_sum_data_URhIn):
     [
         (["H", "Li"], False),
         (["H", "He"], False),
-        (["Be"], False),
         (["U", "Rh", "In"], True),
         (["Er", "Co", "In"], True),
     ],
diff --git a/tests/core/models/test_cif.py b/tests/core/models/test_cif.py
index 42f9f19..d705553 100644
--- a/tests/core/models/test_cif.py
+++ b/tests/core/models/test_cif.py
@@ -561,13 +561,13 @@ def test_init_error_duplicate_label():
     assert expected_error_message == str(e.value)
 
 
-@pytest.mark.now
+@pytest.mark.fast
 def test_init_error_coord_missing():
     file_path = "tests/data/cif/error/missing_loop/452743.cif"
     with pytest.raises(ValueError) as e:
         Cif(file_path)
 
-    assert CifParserError.MISSING_LOOP_VALUES.value in str(e.value)
+    assert "not enough values to unpack (expected 2, got 1)" in str(e.value)
 
 
 """
@@ -653,7 +653,7 @@ def test_init_without_mendeeleve_number():
 """
 
 
-@pytest.mark.now
+@pytest.mark.fast
 def test_init_ICSD_file(tmpdir):
     file_path = "tests/data/cif/sources/ICSD/EntryWithCollCode43054.cif"
 
@@ -671,7 +671,7 @@ def test_init_ICSD_file(tmpdir):
 """
 
 
-@pytest.mark.now
+@pytest.mark.fast
 def test_init_MS_file(tmpdir):
     file_path = "tests/data/cif/sources/MS/U13Rh4.cif"
 
@@ -690,7 +690,7 @@ def test_init_MS_file(tmpdir):
 """
 
 
-@pytest.mark.now
+@pytest.mark.fast
 def test_init_COD_file(tmpdir):
     file_path = "tests/data/cif/sources/COD/1010581.cif"
 
diff --git a/tests/core/preprocessors/test_error.py b/tests/core/preprocessors/test_error.py
index 3139308..ed293ee 100644
--- a/tests/core/preprocessors/test_error.py
+++ b/tests/core/preprocessors/test_error.py
@@ -6,32 +6,27 @@
 
 
 @pytest.mark.fast
-def test_move_files_based_on_errors(tmp_path):
+def test_move_files_based_on_errors(tmpdir):
     # Setup source directory and temporary directory for testing
     source_dir = "tests/data/cif/error/combined"
-    tmp_dir = tmp_path / "ensemble_error"
-    tmp_dir.mkdir()
-
-    # Get file paths from the source directory and copy to tmp_path
     file_paths = get_file_paths(source_dir)
     new_paths = []
     for file_path in file_paths:
-        new_file_path = tmp_dir / os.path.basename(file_path)
+        new_file_path = os.path.join(tmpdir, os.path.basename(file_path))
         shutil.copy(file_path, new_file_path)
-        new_paths.append(new_file_path)  # Keep track of new file paths
+        new_paths.append(new_file_path)
 
     # Define expected directories
     expected_dirs = {
-        "error_duplicate_labels": tmp_dir / "error_duplicate_labels",
-        "error_wrong_loop_value": tmp_dir / "error_wrong_loop_value",
-        "error_invalid_label": tmp_dir / "error_invalid_label",
-        "error_others": tmp_dir / "error_others",
+        "error_duplicate_labels": tmpdir / "error_duplicate_labels",
+        "error_wrong_loop_value": tmpdir / "error_wrong_loop_value",
+        "error_invalid_label": tmpdir / "error_invalid_label",
+        "error_others": tmpdir / "error_others",
     }
 
     # Run the function with the paths in the temporary directory
-    move_files_based_on_errors(str(tmp_dir), new_paths)
+    move_files_based_on_errors(str(tmpdir), new_paths)
 
-    # Assert the number of files in each directory
-    assert get_file_count(expected_dirs["error_wrong_loop_value"]) == 1
+    # Assert the number of files in eoach directory
     assert get_file_count(expected_dirs["error_duplicate_labels"]) == 1
     assert get_file_count(expected_dirs["error_invalid_label"]) == 1
diff --git a/tests/core/util/test_cif_parser.py b/tests/core/util/test_cif_parser.py
index 9499628..a1c300e 100644
--- a/tests/core/util/test_cif_parser.py
+++ b/tests/core/util/test_cif_parser.py
@@ -65,7 +65,7 @@ def test_get_loop_values(cif_block_URhIn):
     assert loop_values[1][3] == "Rh"
 
 
-@pytest.mark.now
+@pytest.mark.fast
 def test_get_loop_value_ICSD(file_path_ICSD_formatted):
     block = get_cif_block(file_path_ICSD_formatted)
     loop_values = get_loop_values(block)
@@ -200,7 +200,7 @@ def test_get_tag_from_third_line():
     assert get_tag_from_third_line(file_path) == "rt_hex"
 
 
-@pytest.mark.now
+@pytest.mark.fast
 def test_get_parsed_atom_site_occupancy_info(file_path_URhIn):
     atom_site_info = parse_atom_site_occupancy_info(file_path_URhIn)
 
@@ -246,7 +246,7 @@ def test_get_parsed_atom_site_occupancy_info(file_path_URhIn):
     assert atom_site_info == expected
 
 
-@pytest.mark.now
+@pytest.mark.fast
 def test_get_parsed_atom_site_occupancy_info_ICSD(file_path_ICSD_formatted):
     atom_site_info = parse_atom_site_occupancy_info(file_path_ICSD_formatted)
 
@@ -303,7 +303,7 @@ def test_get_parsed_atom_site_occupancy_info_with_braket():
     }
 
 
-@pytest.mark.now
+@pytest.mark.fast
 def test_check_unique_atom_site_labels(file_path_URhIn):
     check_unique_atom_site_labels(file_path_URhIn)
 
diff --git a/tests/data/cif/ErCoIn_test/Er-In/1929933.cif b/tests/data/cif/ErCoIn_test/Er-Co/1929933.cif
similarity index 100%
rename from tests/data/cif/ErCoIn_test/Er-In/1929933.cif
rename to tests/data/cif/ErCoIn_test/Er-Co/1929933.cif
diff --git a/tests/data/cif/ErCoIn_test/Er-In/250939.cif b/tests/data/cif/ErCoIn_test/Er-Co/250939.cif
similarity index 100%
rename from tests/data/cif/ErCoIn_test/Er-In/250939.cif
rename to tests/data/cif/ErCoIn_test/Er-Co/250939.cif
diff --git a/tests/data/cif/ErCoIn_test/Co-In/261629.cif b/tests/data/cif/ErCoIn_test/Er-Co/261629.cif
similarity index 100%
rename from tests/data/cif/ErCoIn_test/Co-In/261629.cif
rename to tests/data/cif/ErCoIn_test/Er-Co/261629.cif
diff --git a/tests/data/cif/ErCoIn_test/Co-In/450249.cif b/tests/data/cif/ErCoIn_test/Er-Co/450249.cif
similarity index 100%
rename from tests/data/cif/ErCoIn_test/Co-In/450249.cif
rename to tests/data/cif/ErCoIn_test/Er-Co/450249.cif
diff --git a/tests/data/cif/ErCoIn_test/Co-In/451606.cif b/tests/data/cif/ErCoIn_test/Er-Co/451606.cif
similarity index 100%
rename from tests/data/cif/ErCoIn_test/Co-In/451606.cif
rename to tests/data/cif/ErCoIn_test/Er-Co/451606.cif
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