diff --git a/format-specs/schema.json b/format-specs/schema.json
index d0e928b..26cddec 100644
--- a/format-specs/schema.json
+++ b/format-specs/schema.json
@@ -88,7 +88,8 @@
                         { "type": "string", "minLength": 1 },
                         { "const": "xmin" }
                       ],
-                      "additionalItems": false
+                      "minItems": 2,
+                      "maxItems": 2
                     },
                     "xmax": {
                       "type": "array",
@@ -96,7 +97,8 @@
                         { "type": "string", "minLength": 1 },
                         { "const": "xmax" }
                       ],
-                      "additionalItems": false
+                      "minItems": 2,
+                      "maxItems": 2
                     },
                     "ymin": {
                       "type": "array",
@@ -104,7 +106,8 @@
                         { "type": "string", "minLength": 1 },
                         { "const": "ymin" }
                       ],
-                      "additionalItems": false
+                      "minItems": 2,
+                      "maxItems": 2
                     },
                     "ymax": {
                       "type": "array",
@@ -112,7 +115,8 @@
                         { "type": "string", "minLength": 1 },
                         { "const": "ymax" }
                       ],
-                      "additionalItems": false
+                      "minItems": 2,
+                      "maxItems": 2
                     }
                   }
                 }
diff --git a/scripts/test_json_schema.py b/scripts/test_json_schema.py
index ddb4062..61a1b4b 100644
--- a/scripts/test_json_schema.py
+++ b/scripts/test_json_schema.py
@@ -243,6 +243,26 @@ def get_version() -> str:
 }
 invalid_cases["empty_column_name"] = metadata
 
+metadata = copy.deepcopy(metadata_covering_template)
+metadata["columns"]["geometry"]["covering"]["bbox"]["xmin"] = []
+invalid_cases["xmin_array_length_must_be_2_is_0"] = metadata
+
+metadata = copy.deepcopy(metadata_covering_template)
+metadata["columns"]["geometry"]["covering"]["bbox"]["ymax"] = []
+invalid_cases["ymax_array_length_must_be_2_is_0"] = metadata
+
+metadata = copy.deepcopy(metadata_covering_template)
+metadata["columns"]["geometry"]["covering"]["bbox"]["ymin"] = ["column"]
+invalid_cases["ymin_array_length_must_be_2_is_1"] = metadata
+
+metadata = copy.deepcopy(metadata_covering_template)
+metadata["columns"]["geometry"]["covering"]["bbox"]["xmax"] = ["column"]
+invalid_cases["xmax_array_length_must_be_2_is_1"] = metadata
+
+metadata = copy.deepcopy(metadata_covering_template)
+metadata["columns"]["geometry"]["covering"]["bbox"]["xmin"] = ["xmin", "xmin", "xmin"]
+invalid_cases["xmin_array_length_must_be_2_is_3"] = metadata
+
 metadata = copy.deepcopy(metadata_covering_template)
 metadata["columns"]["geometry"]["covering"].pop("bbox")
 invalid_cases["empty_geometry_bbox"] = metadata