diff --git a/src/font/shaper/coretext.zig b/src/font/shaper/coretext.zig
index ff7c6d9d3..3f69af6d2 100644
--- a/src/font/shaper/coretext.zig
+++ b/src/font/shaper/coretext.zig
@@ -2585,7 +2585,7 @@ fn testShaperWithFont(alloc: Allocator, font_req: TestFont) !TestShaper {
         });
     } else {
         // On CoreText we want to load Apple Emoji, we should have it.
-        var disco = font.Discover.init();
+        var disco = font.Discover.init(lib);
         defer disco.deinit();
         var disco_it = try disco.discover(alloc, .{
             .family = "Apple Color Emoji",
@@ -2640,7 +2640,7 @@ fn testShaperWithDiscoveredFont(alloc: Allocator, font_req: [:0]const u8) !TestS
 
     // Discover and add our font to the collection.
     {
-        var disco = font.Discover.init();
+        var disco = font.Discover.init(lib);
         defer disco.deinit();
         var disco_it = try disco.discover(alloc, .{
             .family = font_req,
diff --git a/src/font/shaper/harfbuzz.zig b/src/font/shaper/harfbuzz.zig
index 9c78d9de3..a400ecaff 100644
--- a/src/font/shaper/harfbuzz.zig
+++ b/src/font/shaper/harfbuzz.zig
@@ -2071,7 +2071,7 @@ fn testShaperWithFont(alloc: Allocator, font_req: TestFont) !TestShaper {
         });
     } else {
         // On CoreText we want to load Apple Emoji, we should have it.
-        var disco = font.Discover.init();
+        var disco = font.Discover.init(lib);
         defer disco.deinit();
         var disco_it = try disco.discover(alloc, .{
             .family = "Apple Color Emoji",
@@ -2126,7 +2126,7 @@ fn testShaperWithDiscoveredFont(alloc: Allocator, font_req: [:0]const u8) !TestS
 
     // Discover and add our font to the collection.
     {
-        var disco = font.Discover.init();
+        var disco = font.Discover.init(lib);
         defer disco.deinit();
         var disco_it = try disco.discover(alloc, .{
             .family = font_req,