diff --git a/plugins/lsp/language-servers/efmls-configs-pkgs.nix b/plugins/lsp/language-servers/efmls-configs-pkgs.nix
index 2509adef..27dee6d1 100644
--- a/plugins/lsp/language-servers/efmls-configs-pkgs.nix
+++ b/plugins/lsp/language-servers/efmls-configs-pkgs.nix
@@ -16,6 +16,7 @@ in
     "forge_fmt"
     "gersemi"
     "js_standard"
+    "kdlfmt"
     "markuplint"
     "mix"
     "pint"
diff --git a/tests/test-sources/plugins/lsp/efmls-configs.nix b/tests/test-sources/plugins/lsp/efmls-configs.nix
index 225dfb1c..4beeeb41 100644
--- a/tests/test-sources/plugins/lsp/efmls-configs.nix
+++ b/tests/test-sources/plugins/lsp/efmls-configs.nix
@@ -66,6 +66,7 @@
           "forge_fmt"
           "gersemi"
           "js_standard"
+          "kdlfmt"
           "markuplint"
           "mix"
           "pint"