diff --git a/tests/test_converters.py b/tests/test_converters.py
index f381ce8..d60a470 100644
--- a/tests/test_converters.py
+++ b/tests/test_converters.py
@@ -17,12 +17,70 @@ def test_json_to_txt_preserves_order():
     assert robots_txt == "User-agent: BotA\nUser-agent: BotB\nDisallow: /\n"
 
 
+def test_json_to_txt_handles_empty_input():
+    assert robots.json_to_txt({}) == "\nDisallow: /\n"
+
+
 def test_list_to_pcre_escapes_special_characters():
     items = ["Bot+One", "Bot(Two)"]
-    expected = f"({"|".join(map(re.escape, items))})"
+    expected = f"({'|'.join(map(re.escape, items))})"
     assert robots.list_to_pcre(items) == expected
 
 
+def test_list_to_pcre_supports_dict_keys_iterable():
+    agents = {"Bot+One": {}, "Bot(Two)": {}}
+    expected = f"({'|'.join(map(re.escape, agents.keys()))})"
+    assert robots.list_to_pcre(agents.keys()) == expected
+
+
+def test_json_to_htaccess_contains_rewrite_rules_and_robots_exception():
+    config = robots.json_to_htaccess({"Bot+One": {}, "Bot(Two)": {}})
+    assert config.startswith("RewriteEngine On\n")
+    assert "RewriteCond %{HTTP_USER_AGENT} (Bot\\+One|Bot\\(Two\\)) [NC]" in config
+    assert "RewriteRule !^/?robots\\.txt$ - [F]" in config
+
+
 def test_json_to_nginx_includes_robots_txt_exception():
     config = robots.json_to_nginx({"BotA": {}})
     assert "if ($request_uri = \"/robots.txt\")" in config
+    assert "if ($block)" in config
+    assert "return 403;" in config
+
+
+def test_json_to_lighttpd_contains_user_agent_and_robots_exception():
+    config = robots.json_to_lighttpd({"BotA": {}})
+    assert '$HTTP["url"] != "/robots.txt"' in config
+    assert '$HTTP["user-agent"] =~ "(BotA)"' in config
+
+
+def test_json_to_caddy_contains_user_agent_matcher():
+    config = robots.json_to_caddy({"BotA": {}, "BotB": {}})
+    assert config.startswith("@aibots {")
+    assert 'header_regexp User-Agent "(BotA|BotB)"' in config
+    assert config.strip().endswith("}")
+
+
+def test_json_to_haproxy_emits_one_agent_per_line():
+    config = robots.json_to_haproxy({"BotA": {}, "BotB": {}})
+    assert config == "BotA\nBotB"
+
+
+def test_escape_md_escapes_markdown_specials():
+    value = "A_B+C[Z]-!"
+    escaped = robots.escape_md(value)
+    assert escaped == r"A\_B\+C\[Z\]\-\!"
+
+
+def test_json_to_table_renders_expected_row():
+    robots_json = {
+        "BotA": {
+            "operator": "Op",
+            "respect": "Yes",
+            "function": "Crawler",
+            "frequency": "Daily",
+            "description": "Desc",
+        }
+    }
+    table = robots.json_to_table(robots_json)
+    assert table.startswith("| Name | Operator |")
+    assert "| BotA | Op | Yes | Crawler | Daily | Desc |" in table