diff --git a/.github/workflows/integrations.yml b/.github/workflows/integrations.yml
index 7de38c0..869ec39 100644
--- a/.github/workflows/integrations.yml
+++ b/.github/workflows/integrations.yml
@@ -20,7 +20,7 @@ jobs:
 
       - name: install zig
         run: |
-          ZIG_VERSION=0.12.0-dev.2858+7230b68b3
+          ZIG_VERSION=0.12.0-dev.3291+17bad9f88
           wget https://ziglang.org/builds/zig-linux-x86_64-$ZIG_VERSION.tar.xz
           tar xf zig-linux-x86_64-$ZIG_VERSION.tar.xz
           mv zig-linux-x86_64-$ZIG_VERSION $HOME/zig-build
diff --git a/README.md b/README.md
index e965bc9..51a4d49 100644
--- a/README.md
+++ b/README.md
@@ -329,9 +329,17 @@ fn main() !void {
 
 ## Integration Tests
 - Start up mysql/mariadb in docker:
-  - `docker run --name some-mysql --env MYSQL_ROOT_PASSWORD=password -p 3306:3306 -d mysql`
-  - `docker run --name some-mariadb --env MARIADB_ROOT_PASSWORD=password -p 3306:3306 -d mariadb`
-- Run all the test: In root directory of project: `zig test integration_test -Dtest-filer='...'`
+```bash
+# MySQL
+docker run --name some-mysql --env MYSQL_ROOT_PASSWORD=password -p 3306:3306 -d mysql
+```bash
+# MariaDB
+docker run --name some-mariadb --env MARIADB_ROOT_PASSWORD=password -p 3306:3306 -d mariadb
+```
+- Run all the test: In root directory of project:
+```bash
+zig build integration_test -Dtest-filer='...'
+```
 
 ## Philosophy
 ### Correctness
diff --git a/build.zig b/build.zig
index c5d21d3..1fa9bfc 100644
--- a/build.zig
+++ b/build.zig
@@ -5,13 +5,14 @@ pub fn build(b: *std.Build) void {
         .root_source_file = .{ .path = "./src/myzql.zig" },
     });
 
-    const test_filter = b.option([]const u8, "test-filter", "Filter for tests to run"); // -Dtest-filter="..."
+    // -Dtest-filter="..."
+    const test_filter = b.option([]const u8, "test-filter", "Filter for tests to run");
 
     // zig build unit_test
     const unit_tests = b.addTest(.{
         .root_source_file = .{ .path = "./src/myzql.zig" },
     });
-    unit_tests.filter = test_filter;
+    if (test_filter) |t| unit_tests.filters = &.{t};
 
     // zig build [install]
     b.installArtifact(unit_tests);
@@ -26,12 +27,12 @@ pub fn build(b: *std.Build) void {
         .root_source_file = .{ .path = "./integration_tests/main.zig" },
     });
     integration_tests.root_module.addImport("myzql", myzql);
-    integration_tests.filter = test_filter;
+    if (test_filter) |t| unit_tests.filters = &.{t};
 
     // zig build [install]
     b.installArtifact(integration_tests);
 
-    // zig build run_integration_test
+    // zig build integration_test
     const run_integration_tests = b.addRunArtifact(integration_tests);
     const integration_test_step = b.step("integration_test", "Run integration tests");
     integration_test_step.dependOn(&run_integration_tests.step);