diff --git a/build.zig b/build.zig
index a1d5381..67cb776 100644
--- a/build.zig
+++ b/build.zig
@@ -27,9 +27,7 @@ pub fn build(b: *std.Build) void {
     const run_cmd = b.addRunArtifact(exe);
     run_cmd.step.dependOn(b.getInstallStep());
 
-    if (b.args) |args| {
-        run_cmd.addArgs(args);
-    }
+    run_cmd.addPassthruArgs();
 
     const run_step = b.step("run", "Run the test framework");
     run_step.dependOn(&run_cmd.step);
diff --git a/src/compat.zig b/src/compat.zig
index eec0703..bce2ea5 100644
--- a/src/compat.zig
+++ b/src/compat.zig
@@ -113,7 +113,7 @@ fn closeFd(fd: std.posix.fd_t) void {
 /// Read entire file contents using POSIX APIs.
 /// Replaces std.fs.cwd().openFile() + file.readToEndAlloc().
 pub fn readFileAlloc(allocator: std.mem.Allocator, path: []const u8) ![]const u8 {
-    const path_z = try allocator.dupeZ(u8, path);
+    const path_z = try allocator.dupeSentinel(u8, path, 0);
     defer allocator.free(path_z);
 
     const fd = std.posix.openatZ(std.posix.AT.FDCWD, path_z, .{}, 0) catch |err| {
@@ -139,7 +139,7 @@ pub fn readFileAlloc(allocator: std.mem.Allocator, path: []const u8) ![]const u8
 /// Write content to a file using POSIX APIs.
 /// Replaces std.fs.cwd().createFile() + file.writeAll().
 pub fn writeFile(allocator: std.mem.Allocator, path: []const u8, content: []const u8) !void {
-    const path_z = try allocator.dupeZ(u8, path);
+    const path_z = try allocator.dupeSentinel(u8, path, 0);
     defer allocator.free(path_z);
 
     const fd = std.posix.openatZ(std.posix.AT.FDCWD, path_z, .{
@@ -161,7 +161,7 @@ pub fn writeFile(allocator: std.mem.Allocator, path: []const u8, content: []cons
 /// Delete a file using POSIX APIs.
 /// Replaces std.fs.cwd().deleteFile().
 pub fn deleteFile(allocator: std.mem.Allocator, path: []const u8) !void {
-    const path_z = try allocator.dupeZ(u8, path);
+    const path_z = try allocator.dupeSentinel(u8, path, 0);
     defer allocator.free(path_z);
     const rc = std.c.unlink(path_z);
     if (rc != 0) {
@@ -175,7 +175,7 @@ pub fn deleteFile(allocator: std.mem.Allocator, path: []const u8) !void {
 /// Create directories recursively using POSIX APIs.
 /// Replaces std.fs.cwd().makePath().
 pub fn makePath(allocator: std.mem.Allocator, path: []const u8) !void {
-    const path_z = try allocator.dupeZ(u8, path);
+    const path_z = try allocator.dupeSentinel(u8, path, 0);
     defer allocator.free(path_z);
 
     const rc = std.c.mkdir(path_z, 0o755);
@@ -189,7 +189,7 @@ pub fn makePath(allocator: std.mem.Allocator, path: []const u8) !void {
                 if (sep > 0) {
                     try makePath(allocator, path[0..sep]);
                     // Retry creating the directory
-                    const retry_z = try allocator.dupeZ(u8, path);
+                    const retry_z = try allocator.dupeSentinel(u8, path, 0);
                     defer allocator.free(retry_z);
                     const rc2 = std.c.mkdir(retry_z, 0o755);
                     if (rc2 != 0 and std.c.errno(rc2) != .EXIST) {
@@ -298,7 +298,7 @@ pub fn spawnAndWait(
     defer allocator.free(c_argv);
 
     for (argv, 0..) |arg, i| {
-        const z = try allocator.dupeZ(u8, arg);
+        const z = try allocator.dupeSentinel(u8, arg, 0);
         c_argv[i] = z.ptr;
     }
     c_argv[argv.len] = null;
diff --git a/src/snapshot.zig b/src/snapshot.zig
index 47c21af..a114295 100644
--- a/src/snapshot.zig
+++ b/src/snapshot.zig
@@ -251,16 +251,16 @@ pub const Snapshot = struct {
             },
             .@"struct" => {
                 try writer.writeAll("{\n");
-                inline for (type_info.@"struct".fields, 0..) |field, i| {
+                inline for (type_info.@"struct".field_names, 0..) |field_name, i| {
                     if (self.options.pretty_print) {
                         try writer.writeAll("  ");
                     }
-                    try writer.print("\"{s}\": ", .{field.name});
+                    try writer.print("\"{s}\": ", .{field_name});
 
-                    const field_value = @field(value, field.name);
+                    const field_value = @field(value, field_name);
                     try self.formatJsonValue(writer, field_value);
 
-                    if (i < type_info.@"struct".fields.len - 1) {
+                    if (i < type_info.@"struct".field_names.len - 1) {
                         try writer.writeAll(",");
                     }
                     if (self.options.pretty_print) {
@@ -307,10 +307,10 @@ pub const Snapshot = struct {
 
         try writer.writeAll("{\n");
 
-        inline for (type_info.@"struct".fields, 0..) |field, i| {
-            try writer.print("  \"{s}\": ", .{field.name});
+        inline for (type_info.@"struct".field_names, 0..) |field_name, i| {
+            try writer.print("  \"{s}\": ", .{field_name});
 
-            const field_value = @field(value, field.name);
+            const field_value = @field(value, field_name);
             const FieldType = @TypeOf(field_value);
             const field_info = @typeInfo(FieldType);
 
@@ -328,7 +328,7 @@ pub const Snapshot = struct {
                 else => try writer.print("{any}", .{field_value}),
             }
 
-            if (i < type_info.@"struct".fields.len - 1) {
+            if (i < type_info.@"struct".field_names.len - 1) {
                 try writer.writeAll(",\n");
             } else {
                 try writer.writeAll("\n");