diff --git a/src/automlst/engine/data/local/csv.py b/src/automlst/engine/data/local/csv.py
index 832ee47..d8e97f5 100644
--- a/src/automlst/engine/data/local/csv.py
+++ b/src/automlst/engine/data/local/csv.py
@@ -11,8 +11,8 @@ def dict_loci_alleles_variants_from_loci(alleles_map: Mapping[str, Sequence[Alle
         if len(alleles) == 1:
             result_dict[loci] = alleles[0].allele_variant
         else:
+            result_locis = list()
             for allele in alleles:
-                result_locis = list()
                 result_locis.append(allele.allele_variant)
                 result_dict[loci] = result_locis
     return result_dict
diff --git a/tests/automlst/engine/data/local/test_csv.py b/tests/automlst/engine/data/local/test_csv.py
index 2095990..584523d 100644
--- a/tests/automlst/engine/data/local/test_csv.py
+++ b/tests/automlst/engine/data/local/test_csv.py
@@ -9,4 +9,13 @@ def test_dict_loci_alleles_variants_from_loci_single_loci_not_list():
     results = dict_loci_alleles_variants_from_loci(alleles_map)
     for loci, variant in results.items():
         assert isinstance(variant, str)
-        assert variant == "1"
\ No newline at end of file
+        assert variant == "1"
+
+def test_dict_loci_alleles_variants_from_loci_multi_loci_is_list():
+    alleles_map = {
+        "adk": [Allele("adk", "1", None), Allele("adk", "2", None)]
+    }
+    results = dict_loci_alleles_variants_from_loci(alleles_map)
+    for loci, variant in results.items():
+        assert isinstance(variant, list)
+        assert len(variant) == 2
\ No newline at end of file