diff --git a/rohmu/object_storage/azure.py b/rohmu/object_storage/azure.py
index f025f22b..22635eba 100644
--- a/rohmu/object_storage/azure.py
+++ b/rohmu/object_storage/azure.py
@@ -123,20 +123,24 @@ def conn_string(
         is_secure: bool,
     ) -> str:
         protocol = "https" if is_secure else "http"
-        conn_str = f"DefaultEndpointsProtocol={protocol};" f"AccountName={account_name};" f"AccountKey={account_key};"
+        conn = [
+            f"DefaultEndpointsProtocol={protocol}",
+            f"AccountName={account_name}",
+            f"AccountKey={account_key}",
+        ]
         if not host and not port:
             try:
                 endpoint_suffix = ENDPOINT_SUFFIXES[azure_cloud]
             except KeyError:
                 raise InvalidConfigurationError(f"Unknown azure cloud {repr(azure_cloud)}")
 
-            conn_str = f"{conn_str}" f"EndpointSuffix={endpoint_suffix};"
+            conn.append(f"EndpointSuffix={endpoint_suffix}")
         else:
             if not host or not port:
                 raise InvalidConfigurationError("Custom host and port must be specified together")
 
-            conn_str = f"{conn_str}" f"BlobEndpoint={protocol}://{host}:{port}/{account_name};"
-        return conn_str
+            conn.append(f"BlobEndpoint={protocol}://{host}:{port}/{account_name}")
+        return ";".join(conn)
 
     def copy_file(
         self, *, source_key: str, destination_key: str, metadata: Optional[Metadata] = None, **kwargs: Any
diff --git a/test/object_storage/test_azure.py b/test/object_storage/test_azure.py
index 73edd92e..66de2c09 100644
--- a/test/object_storage/test_azure.py
+++ b/test/object_storage/test_azure.py
@@ -112,12 +112,12 @@ def test_get_contents_to_fileobj_raises_error_on_invalid_byte_range(azure_module
             None,
             None,
             True,
-            "".join(
+            ";".join(
                 [
-                    "DefaultEndpointsProtocol=https;",
-                    "AccountName=test_name;",
-                    "AccountKey=test_key;",
-                    "EndpointSuffix=core.windows.net;",
+                    "DefaultEndpointsProtocol=https",
+                    "AccountName=test_name",
+                    "AccountKey=test_key",
+                    "EndpointSuffix=core.windows.net",
                 ]
             ),
         ),
@@ -125,12 +125,12 @@ def test_get_contents_to_fileobj_raises_error_on_invalid_byte_range(azure_module
             None,
             None,
             False,
-            "".join(
+            ";".join(
                 [
-                    "DefaultEndpointsProtocol=http;",
-                    "AccountName=test_name;",
-                    "AccountKey=test_key;",
-                    "EndpointSuffix=core.windows.net;",
+                    "DefaultEndpointsProtocol=http",
+                    "AccountName=test_name",
+                    "AccountKey=test_key",
+                    "EndpointSuffix=core.windows.net",
                 ]
             ),
         ),
@@ -138,12 +138,12 @@ def test_get_contents_to_fileobj_raises_error_on_invalid_byte_range(azure_module
             "localhost",
             10000,
             True,
-            "".join(
+            ";".join(
                 [
-                    "DefaultEndpointsProtocol=https;",
-                    "AccountName=test_name;",
-                    "AccountKey=test_key;",
-                    "BlobEndpoint=https://localhost:10000/test_name;",
+                    "DefaultEndpointsProtocol=https",
+                    "AccountName=test_name",
+                    "AccountKey=test_key",
+                    "BlobEndpoint=https://localhost:10000/test_name",
                 ]
             ),
         ),
@@ -151,12 +151,12 @@ def test_get_contents_to_fileobj_raises_error_on_invalid_byte_range(azure_module
             "localhost",
             10000,
             False,
-            "".join(
+            ";".join(
                 [
-                    "DefaultEndpointsProtocol=http;",
-                    "AccountName=test_name;",
-                    "AccountKey=test_key;",
-                    "BlobEndpoint=http://localhost:10000/test_name;",
+                    "DefaultEndpointsProtocol=http",
+                    "AccountName=test_name",
+                    "AccountKey=test_key",
+                    "BlobEndpoint=http://localhost:10000/test_name",
                 ]
             ),
         ),