diff --git a/flake.nix b/flake.nix
index cc95dbe..a3791cd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,7 +34,7 @@
         inherit (tix.packages.${system}) watch watchpipe results;
 
         test = tix.run [
-          # ./testing/md.test.nix
+          ./testing/md.test.nix
           ./testing/html.test.nix
           ./testing/elems.test.nix
           ./testing/builder.test.nix
diff --git a/nixite/md.nix b/nixite/md.nix
index 7aa90af..a466c80 100644
--- a/nixite/md.nix
+++ b/nixite/md.nix
@@ -58,40 +58,41 @@ in rec {
     ];
 
   replace = regex: apply: block:
-    assert builtins.isString block; (let
-      m = builtins.match regex block;
-      before = builtins.elemAt m 0;
-      after = toString (builtins.elemAt m (matchCount - 1));
-      matchCount = builtins.length m;
-    in
-      if m == null
-      then block
-      else
-        (
-          if before == null
-          then ""
-          else replace regex apply before
-        )
-        + (apply m)
-        + after);
+    if toString block == ""
+    then ""
+    else
+      (let
+        match = builtins.match regex block;
+        before = builtins.elemAt match 0;
+        matchCount = builtins.length match;
+        after = builtins.elemAt match (matchCount - 1);
+      in
+        if match == null
+        then block
+        else
+          (
+            replace regex apply before
+          )
+          + (apply match)
+          + after);
 
   rule = matcher: apply: blocks:
-    map (block:
-      if builtins.isString block
-      then replace matcher apply block
-      else block)
-    blocks;
+    if builtins.isString blocks
+    then replace matcher apply blocks
+    else if builtins.isList blocks
+    then map (replace matcher apply) blocks
+    else throw "replace rule should be applied to string or list of strings";
 
-  applyRules = i: rules: input: let
+  applyRules = index: rules: input: let
     group =
       if builtins.isString input
       then [input]
       else input;
     len = builtins.length rules;
-    rule = builtins.elemAt rules i;
-    next = i + 1;
+    rule = builtins.elemAt rules index;
+    next = index + 1;
   in
-    assert i < len;
+    assert index < len;
       if next < len
       then rule (applyRules next rules group)
       else rule group;
@@ -124,15 +125,22 @@ in rec {
     (basicRule (containsBreak "<(${linkmatcher})>") (m: elems.a m m))
   ];
 
-  list = rule "((.*)(\n([^-\n][^\n]+)?\n))?((- [^\n]+\n)+)(.*)" (
-    l: (elems.ul (basicRule "(.*\n)?- ([^\n]+)\n(.*)" (m:
-      elems.li (basicRule "()\\[(.)] (.*)" (check:
-        elems.input {
-          type = "checkbox";
-          checked = check != " ";
-          disabled = true;
-        }) [m])) [(builtins.elemAt l 4)]))
-  );
+  list = let
+    addCheckboxes = basicRule "()\\[(.)] (.*)" (check:
+      elems.input {
+        type = "checkbox";
+        checked = check != " ";
+        disabled = true;
+      });
+
+    listitems =
+      basicRule "(.*\n)?- ([^\n]+)\n(.*)" (contents:
+        elems.li (addCheckboxes contents));
+  in (rule "((.*)(\n([^-\n][^\n]+)?\n))?((- [^\n]+\n)+)(.*)" (
+    match: let
+      listString = builtins.elemAt match 4;
+    in (elems.ul (listitems listString))
+  ));
 
   linkmatcher = "[-[:alnum:].%?&#=:/]+";
   contains = matcher: "(.*)?${matcher}(.*)";