diff --git a/internal/cli/root.go b/internal/cli/root.go
index d5abf16..c94c0fe 100644
--- a/internal/cli/root.go
+++ b/internal/cli/root.go
@@ -3,12 +3,12 @@ package cli
 import (
 	"context"
 	"fmt"
-	"os"
 	"strconv"
 	"strings"
 	"time"
 
 	"github.com/AlecAivazis/survey/v2"
+	"github.com/b-jonathan/taco/internal/fsutil"
 	"github.com/b-jonathan/taco/internal/gh"
 	"github.com/b-jonathan/taco/internal/git"
 	"github.com/b-jonathan/taco/internal/logx"
@@ -161,7 +161,7 @@ func initCmd() *cobra.Command {
 			}
 
 			projectRoot := params.Name
-			if err := os.MkdirAll(projectRoot, 0o755); err != nil {
+			if err := fsutil.Fs.MkdirAll(projectRoot, 0o755); err != nil {
 				return fmt.Errorf("mkdir project root: %w", err)
 			}
 
diff --git a/internal/git/git.go b/internal/git/git.go
index 5282eac..2c61787 100644
--- a/internal/git/git.go
+++ b/internal/git/git.go
@@ -7,6 +7,7 @@ import (
 	"path/filepath"
 
 	"github.com/b-jonathan/taco/internal/execx"
+	"github.com/b-jonathan/taco/internal/fsutil"
 )
 
 // TODO: There is absolutely no reason for init and push to be in one function, gonna have to refactor this for sure
@@ -14,7 +15,7 @@ import (
 func Init(ctx context.Context, projectRoot string) error {
 
 	// If already a repo, skip init
-	if _, err := os.Stat(filepath.Join(projectRoot, ".git")); os.IsNotExist(err) {
+	if _, err := fsutil.Fs.Stat(filepath.Join(projectRoot, ".git")); os.IsNotExist(err) {
 		if err := execx.RunCmd(ctx, projectRoot, "git init"); err != nil {
 			return fmt.Errorf("git init: %w", err)
 		}
diff --git a/internal/nodepkg/nodepkg.go b/internal/nodepkg/nodepkg.go
index 098f96b..dc493d1 100644
--- a/internal/nodepkg/nodepkg.go
+++ b/internal/nodepkg/nodepkg.go
@@ -2,13 +2,15 @@ package nodepkg
 
 import (
 	"encoding/json"
-	"os"
 	"path/filepath"
+
+	"github.com/b-jonathan/taco/internal/fsutil"
+	"github.com/spf13/afero"
 )
 
 func InitPackage(dir string, params InitPackageParams) error {
 	path := filepath.Join(dir, "package.json")
-	b, err := os.ReadFile(path)
+	b, err := afero.ReadFile(fsutil.Fs, path)
 	if err != nil {
 		return err
 	}
@@ -42,5 +44,5 @@ func InitPackage(dir string, params InitPackageParams) error {
 	if err != nil {
 		return err
 	}
-	return os.WriteFile(path, out, 0o644)
+	return afero.WriteFile(fsutil.Fs, path, out, 0o644)
 }
diff --git a/internal/stacks/express/express.go b/internal/stacks/express/express.go
index 1ba9dac..40ba0c7 100644
--- a/internal/stacks/express/express.go
+++ b/internal/stacks/express/express.go
@@ -3,13 +3,13 @@ package express
 import (
 	"context"
 	"fmt"
-	"os"
 	"path/filepath"
 	"strings"
 
 	"github.com/b-jonathan/taco/internal/execx"
 	"github.com/b-jonathan/taco/internal/fsutil"
 	"github.com/b-jonathan/taco/internal/nodepkg"
+	"github.com/spf13/afero"
 
 	"github.com/b-jonathan/taco/internal/stacks"
 )
@@ -28,7 +28,7 @@ func (express) Init(ctx context.Context, opts *Options) error {
 	backendDir := filepath.Join(opts.ProjectRoot, "backend")
 	srcDir := filepath.Join(backendDir, "src")
 
-	if err := os.MkdirAll(srcDir, 0o755); err != nil {
+	if err := fsutil.Fs.MkdirAll(srcDir, 0o755); err != nil {
 		return fmt.Errorf("mkdir: %w", err)
 	}
 
@@ -87,12 +87,12 @@ func (express) Post(ctx context.Context, opts *Options) error {
 		[]string{"backend/node_modules/", "backend/dist/", "backend/.env*"})
 	path := filepath.Join(opts.ProjectRoot, "backend", ".env")
 	dir := filepath.Dir(path)
-	if err := os.MkdirAll(dir, 0o755); err != nil {
+	if err := fsutil.Fs.MkdirAll(dir, 0o755); err != nil {
 		return fmt.Errorf("mkdir %s: %w", dir, err)
 	}
 	content := `PORT=4000
 FRONTEND_ORIGIN=http://localhost:3000`
-	if err := os.WriteFile(path, []byte(content), 0o644); err != nil {
+	if err := afero.WriteFile(fsutil.Fs, path, []byte(content), 0o644); err != nil {
 		return fmt.Errorf("write %s: %w", path, err)
 	}
 
diff --git a/internal/stacks/mongodb/mongodb.go b/internal/stacks/mongodb/mongodb.go
index 6d59011..8a53fa1 100644
--- a/internal/stacks/mongodb/mongodb.go
+++ b/internal/stacks/mongodb/mongodb.go
@@ -3,7 +3,6 @@ package mongodb
 import (
 	"context"
 	"fmt"
-	"os"
 	"path/filepath"
 	"strings"
 	"time"
@@ -13,6 +12,7 @@ import (
 	"github.com/b-jonathan/taco/internal/fsutil"
 	"github.com/b-jonathan/taco/internal/prompt"
 	"github.com/b-jonathan/taco/internal/stacks"
+	"github.com/spf13/afero"
 	"go.mongodb.org/mongo-driver/mongo"
 	"go.mongodb.org/mongo-driver/mongo/options"
 )
@@ -152,7 +152,7 @@ func (mongodb) Generate(ctx context.Context, opts *Options) error {
 	}
 
 	indexPath := filepath.Join(backendDir, "src", "index.ts")
-	indexBytes, err := os.ReadFile(indexPath)
+	indexBytes, err := afero.ReadFile(fsutil.Fs, indexPath)
 	if err != nil {
 		return fmt.Errorf("read index.ts: %w", err)
 	}
@@ -183,15 +183,15 @@ import { connectDB } from "./db/client";`, 1)
 func (mongodb) Post(ctx context.Context, opts *Options) error {
 	// gitignorePath := filepath.Join(opts.ProjectRoot, ".gitignore")
 	// if err := fsutil.EnsureFile(gitignorePath); err != nil {
-	// 	return fmt.Errorf("ensure gitignore file: %w", err)
+	//  return fmt.Errorf("ensure gitignore file: %w", err)
 	// }
 
 	// _ = fsutil.AppendUniqueLines(gitignorePath,
-	// 	[]string{"backend/node_modules/", "backend/dist/", "backend/.env*"})
+	//  []string{"backend/node_modules/", "backend/dist/", "backend/.env*"})
 	path := filepath.Join(opts.ProjectRoot, "backend", ".env")
 	// dir := filepath.Dir(path)
 	// if err := os.MkdirAll(dir, 0o755); err != nil {
-	// 	return fmt.Errorf("mkdir %s: %w", dir, err)
+	//  return fmt.Errorf("mkdir %s: %w", dir, err)
 	// }
 	// TODO: Make this not as scuffed lol
 	content := fmt.Sprintf(`MONGODB_URI=%s/%s`, opts.DatabaseURI, opts.AppName)