diff --git a/lib/to-lua.nix b/lib/to-lua.nix
index 3fcda4bd..d02ba768 100644
--- a/lib/to-lua.nix
+++ b/lib/to-lua.nix
@@ -43,7 +43,7 @@ rec {
         "{ }"
       else
         "{"
-        + (concatStringsSep "," (
+        + (concatStringsSep ", " (
           mapAttrsToList (
             n: v:
             let
@@ -63,7 +63,7 @@ rec {
         ))
         + "}"
     else if builtins.isList args then
-      "{" + concatMapStringsSep "," toLuaObject args + "}"
+      "{" + concatMapStringsSep ", " toLuaObject args + "}"
     else if builtins.isString args then
       # This should be enough!
       builtins.toJSON args
diff --git a/tests/lib-tests.nix b/tests/lib-tests.nix
index e89d97ba..e512661a 100644
--- a/tests/lib-tests.nix
+++ b/tests/lib-tests.nix
@@ -55,7 +55,7 @@ let
           3
         ];
       };
-      expected = ''{foo = "bar",qux = {1,2,3}}'';
+      expected = ''{foo = "bar", qux = {1, 2, 3}}'';
     };
 
     testToLuaObjectRawLua = {
@@ -68,7 +68,7 @@ let
         "__unkeyed...." = "foo";
         bar = "baz";
       };
-      expected = ''{"foo",bar = "baz"}'';
+      expected = ''{"foo", bar = "baz"}'';
     };
 
     testToLuaObjectNestedAttrs = {
@@ -81,7 +81,7 @@ let
           };
         };
       };
-      expected = ''{a = {b = 1,c = 2,d = {e = 3}}}'';
+      expected = ''{a = {b = 1, c = 2, d = {e = 3}}}'';
     };
 
     testToLuaObjectNestedList = {
@@ -98,7 +98,7 @@ let
         ]
         7
       ];
-      expected = "{1,2,{3,4,{5,6}},7}";
+      expected = "{1, 2, {3, 4, {5, 6}}, 7}";
     };
 
     testToLuaObjectNonStringPrims = {
@@ -109,7 +109,7 @@ let
         d = false;
         e = null;
       };
-      expected = ''{a = 1.000000,b = 2,c = true,d = false}'';
+      expected = ''{a = 1.000000, b = 2, c = true, d = false}'';
     };
 
     testToLuaObjectNilPrim = {
@@ -150,7 +150,7 @@ let
           g = helpers.emptyTable;
         };
       };
-      expected = ''{c = { },d = {g = { }}}'';
+      expected = ''{c = { }, d = {g = { }}}'';
     };
 
     testToLuaObjectQuotedKeys = {
@@ -160,7 +160,7 @@ let
         c = "c";
         d-d = "d";
       };
-      expected = ''{["1_a"] = "a",_b = "b",c = "c",["d-d"] = "d"}'';
+      expected = ''{["1_a"] = "a", _b = "b", c = "c", ["d-d"] = "d"}'';
     };
 
     testIsLuaKeyword = {