diff --git a/src/build/Matrix.go b/src/build/Matrix.go
new file mode 100644
index 0000000..b056eb5
--- /dev/null
+++ b/src/build/Matrix.go
@@ -0,0 +1,16 @@
+package build
+
+// Matrix calls the given function with every possible combination of operating systems and architectures.
+func (b *Build) Matrix(call func(*Build)) {
+	systems := []OS{Linux, Mac, Windows}
+	architectures := []Arch{ARM, X86}
+
+	for _, os := range systems {
+		b.OS = os
+
+		for _, arch := range architectures {
+			b.Arch = arch
+			call(b)
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/linker/WriteFile_test.go b/src/linker/WriteFile_test.go
deleted file mode 100644
index 73f4578..0000000
--- a/src/linker/WriteFile_test.go
+++ /dev/null
@@ -1,38 +0,0 @@
-package linker_test
-
-import (
-	"os"
-	"path/filepath"
-	"testing"
-
-	"git.urbach.dev/cli/q/src/build"
-	"git.urbach.dev/cli/q/src/compiler"
-	"git.urbach.dev/cli/q/src/linker"
-	"git.urbach.dev/go/assert"
-)
-
-func TestWriteFile(t *testing.T) {
-	tmpDir := filepath.Join(os.TempDir(), "q", "tests")
-	err := os.MkdirAll(tmpDir, 0o755)
-	assert.Nil(t, err)
-
-	fromPath := "../../examples/hello/hello.q"
-	contents, err := os.ReadFile(fromPath)
-	assert.Nil(t, err)
-
-	toPath := filepath.Join(tmpDir, "hello.q")
-	err = os.WriteFile(toPath, contents, 0o755)
-	assert.Nil(t, err)
-
-	b := build.New(toPath)
-	env, err := compiler.Compile(b)
-	assert.Nil(t, err)
-
-	b.Arch = build.ARM
-	err = linker.WriteFile(b.Executable(), b, env)
-	assert.Nil(t, err)
-
-	b.Arch = build.X86
-	err = linker.WriteFile(b.Executable(), b, env)
-	assert.Nil(t, err)
-}
\ No newline at end of file
diff --git a/src/linker/Write_test.go b/src/linker/Write_test.go
new file mode 100644
index 0000000..bbde817
--- /dev/null
+++ b/src/linker/Write_test.go
@@ -0,0 +1,23 @@
+package linker_test
+
+import (
+	"testing"
+
+	"git.urbach.dev/cli/q/src/build"
+	"git.urbach.dev/cli/q/src/compiler"
+	"git.urbach.dev/cli/q/src/exe"
+	"git.urbach.dev/cli/q/src/linker"
+	"git.urbach.dev/go/assert"
+)
+
+func TestWrite(t *testing.T) {
+	b := build.New("../../examples/hello")
+
+	b.Matrix(func(b *build.Build) {
+		env, err := compiler.Compile(b)
+		assert.Nil(t, err)
+
+		writer := &exe.Discard{}
+		linker.Write(writer, b, env)
+	})
+}
\ No newline at end of file
diff --git a/src/ssa2asm/Compiler_test.go b/src/ssa2asm/Compiler_test.go
index d8b5f50..a9adadc 100644
--- a/src/ssa2asm/Compiler_test.go
+++ b/src/ssa2asm/Compiler_test.go
@@ -10,16 +10,9 @@ import (
 
 func TestHelloExample(t *testing.T) {
 	b := build.New("../../examples/hello")
-	systems := []build.OS{build.Linux, build.Mac, build.Windows}
-	architectures := []build.Arch{build.ARM, build.X86}
 
-	for _, os := range systems {
-		b.OS = os
-
-		for _, arch := range architectures {
-			b.Arch = arch
-			_, err := compiler.Compile(b)
-			assert.Nil(t, err)
-		}
-	}
+	b.Matrix(func(b *build.Build) {
+		_, err := compiler.Compile(b)
+		assert.Nil(t, err)
+	})
 }
\ No newline at end of file