diff --git a/.gitea/workflows/1.4-CTS.yml b/.gitea/workflows/1.4-CTS.yml
index b772801..83ea2be 100644
--- a/.gitea/workflows/1.4-CTS.yml
+++ b/.gitea/workflows/1.4-CTS.yml
@@ -55,7 +55,7 @@ jobs:
         which deqp-runner && deqp-runner --version || echo "deqp-runner not found"
 
     - name: Run Vulkan CTS
-      run: zig build cts-soft -- --mustpass-list=master
+      run: zig build cts-soft -- --mustpass-list=master -j4
       continue-on-error: true
 
     - name: Verify tests
diff --git a/README.md b/README.md
index 7033fa7..91ab321 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ zig build
 ```
 
 Then ensure thy Vulkan loader is pointed toward the ICD manifest.
-The precise ritual varies by system — consult the tomes of your operating system, or wander the web’s endless mausoleum of documentation.
+The precise ritual varies by system — consult the tomes of your operating system, or wander the web's endless mausoleum of documentation.
 
 Use at your own risk. If thy machine shudders, weeps, or attempts to flee — know that it was warned.
 \
diff --git a/build.zig b/build.zig
index ab24017..fa6c61f 100644
--- a/build.zig
+++ b/build.zig
@@ -255,16 +255,18 @@ fn addMultithreadedCTS(b: *std.Build, target: std.Build.ResolvedTarget, impl: *c
         },
     }));
 
-    const mustpass_override = blk: {
-        if (b.args) |args| {
-            for (args) |arg| {
-                if (std.mem.startsWith(u8, arg, "--mustpass-list")) {
-                    break :blk arg["--mustpass-list=".len..];
-                }
+    var mustpass_override: ?[]const u8 = null;
+    var jobs_count: ?usize = null;
+
+    if (b.args) |args| {
+        for (args) |arg| {
+            if (std.mem.startsWith(u8, arg, "--mustpass-list")) {
+                mustpass_override = arg["--mustpass-list=".len..];
+            } else if (std.mem.startsWith(u8, arg, "-j")) {
+                jobs_count = try std.fmt.parseInt(usize, arg["-j".len..], 10);
             }
         }
-        break :blk null;
-    };
+    }
 
     const mustpass_path = try cts.path(
         if (mustpass_override) |override|
@@ -287,6 +289,9 @@ fn addMultithreadedCTS(b: *std.Build, target: std.Build.ResolvedTarget, impl: *c
     run.addArg(b.fmt("{s}{s}", .{ cache_path, mustpass_path }));
     run.addArg("--output");
     run.addArg("./cts");
+    if (jobs_count) |count| {
+        run.addArg(b.fmt("-j{d}", .{count}));
+    }
     run.addArg("--");
     run.addArg(b.fmt("--deqp-archive-dir={s}{s}", .{ cache_path, try cts.path("").getPath3(b, null).toString(b.allocator) }));
     run.addArg(b.fmt("--deqp-vk-library-path={s}", .{b.getInstallPath(.lib, impl_lib.out_lib_filename)}));