diff --git a/runtime/nextjs_test.go b/runtime/nextjs_test.go
new file mode 100644
index 0000000..3c1cdfd
--- /dev/null
+++ b/runtime/nextjs_test.go
@@ -0,0 +1,100 @@
+package runtime_test
+
+import (
+	"regexp"
+	"strings"
+	"testing"
+
+	"github.com/flexstack/new-dockerfile/runtime"
+)
+
+func TestNextJSMatch(t *testing.T) {
+	tests := []struct {
+		name     string
+		path     string
+		expected bool
+	}{
+		{
+			name:     "NextJS project",
+			path:     "../testdata/nextjs",
+			expected: true,
+		},
+		{
+			name:     "NextJS project with standalone output",
+			path:     "../testdata/nextjs-standalone",
+			expected: true,
+		},
+		{
+			name:     "Not a NextJS project",
+			path:     "../testdata/deno",
+			expected: false,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			nextjs := &runtime.NextJS{Log: logger}
+			if nextjs.Match(test.path) != test.expected {
+				t.Errorf("expected %v, got %v", test.expected, nextjs.Match(test.path))
+			}
+		})
+	}
+}
+
+func TestNextJSGenerateDockerfile(t *testing.T) {
+	tests := []struct {
+		name     string
+		path     string
+		expected []any
+	}{
+		{
+			name:     "NextJS project",
+			path:     "../testdata/nextjs",
+			expected: []any{`ARG VERSION=lts`, `CMD ["node_modules/.bin/next", "start", "-H", "0.0.0.0"]`},
+		},
+		{
+			name:     "NextJS project with standalone output",
+			path:     "../testdata/nextjs-standalone",
+			expected: []any{`ARG VERSION=16.0.0`, `CMD HOSTNAME="0.0.0.0" node server.js`},
+		},
+		{
+			name:     "Not a NextJS project",
+			path:     "../testdata/deno",
+			expected: []any{`ARG VERSION=lts`, `CMD ["node_modules/.bin/next", "start", "-H", "0.0.0.0"]`},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			nextjs := &runtime.NextJS{Log: logger}
+			dockerfile, err := nextjs.GenerateDockerfile(test.path)
+			if err != nil {
+				t.Errorf("unexpected error: %v", err)
+			}
+
+			for _, line := range test.expected {
+				found := false
+				lines := strings.Split(string(dockerfile), "\n")
+
+				for _, l := range lines {
+					switch v := line.(type) {
+					case string:
+						if strings.Contains(l, v) {
+							found = true
+							break
+						}
+					case *regexp.Regexp:
+						if v.MatchString(l) {
+							found = true
+							break
+						}
+					}
+				}
+
+				if !found {
+					t.Errorf("expected %v, not found in %v", line, string(dockerfile))
+				}
+			}
+		})
+	}
+}
diff --git a/testdata/nextjs-standalone/.node-version b/testdata/nextjs-standalone/.node-version
new file mode 100644
index 0000000..0e94e31
--- /dev/null
+++ b/testdata/nextjs-standalone/.node-version
@@ -0,0 +1 @@
+16.0.0
\ No newline at end of file
diff --git a/testdata/nextjs-standalone/next.config.mjs b/testdata/nextjs-standalone/next.config.mjs
new file mode 100644
index 0000000..9dbf091
--- /dev/null
+++ b/testdata/nextjs-standalone/next.config.mjs
@@ -0,0 +1,3 @@
+export default {
+  output: "standalone",
+};
diff --git a/testdata/nextjs-standalone/package.json b/testdata/nextjs-standalone/package.json
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/testdata/nextjs-standalone/package.json
@@ -0,0 +1 @@
+{}
diff --git a/testdata/nextjs/next.config.js b/testdata/nextjs/next.config.js
new file mode 100644
index 0000000..da1bb77
--- /dev/null
+++ b/testdata/nextjs/next.config.js
@@ -0,0 +1,3 @@
+module.exports = {
+  reactStrictMode: true,
+};
diff --git a/testdata/nextjs/package.json b/testdata/nextjs/package.json
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/testdata/nextjs/package.json
@@ -0,0 +1 @@
+{}