diff --git a/src/joinPartial.zig b/src/joinPartial.zig
index d9475b1ec06454ba26e19aabc807f8196ae2a32d..836e038b95bf98918159112b6236c01e53d6975f 100644
--- a/src/joinPartial.zig
+++ b/src/joinPartial.zig
@@ -26,7 +26,7 @@ test {
         .{
             .a = 5,
             .b = 9,
-            .c = 1,
+            .c = null,
         },
     ));
 }