diff --git a/src/libunwind.zig b/src/libunwind.zig
index 2fe8b5e283..11666eec3c 100644
--- a/src/libunwind.zig
+++ b/src/libunwind.zig
@@ -109,7 +109,8 @@ pub fn buildStaticLib(comp: *Compilation) !void {
         .want_tsan = false,
         .want_pic = comp.bin_file.options.pic,
         .want_pie = comp.bin_file.options.pie,
-        .want_lto = comp.bin_file.options.lto,
+        // Disable LTO to avoid https://github.com/llvm/llvm-project/issues/56825
+        .want_lto = false,
         .function_sections = comp.bin_file.options.function_sections,
         .emit_h = null,
         .strip = comp.compilerRtStrip(),
diff --git a/test/standalone/c_compiler/build.zig b/test/standalone/c_compiler/build.zig
index 5d51d2c651..240d535182 100644
--- a/test/standalone/c_compiler/build.zig
+++ b/test/standalone/c_compiler/build.zig
@@ -12,15 +12,9 @@ fn isRunnableTarget(t: CrossTarget) bool {
 }
 
 pub fn build(b: *Builder) void {
-    var mode = b.standardReleaseOptions();
+    const mode = b.standardReleaseOptions();
     const target = b.standardTargetOptions(.{});
 
-    if (mode != .Debug and target.getAbi().isMusl()) {
-        // https://github.com/ziglang/zig/issues/12828
-        std.debug.print("warn: skipping musl libc++ test that regressed with LLVM 15\n", .{});
-        mode = .Debug;
-    }
-
     const test_step = b.step("test", "Test the program");
 
     const exe_c = b.addExecutable("test_c", null);