diff --git a/build.py b/build.py
index f84048a..fa94257 100644
--- a/build.py
+++ b/build.py
@@ -1,4 +1,5 @@
 import os
+import sys
 import hashlib
 import subprocess
 from pathlib import Path
@@ -36,29 +37,43 @@ def md5sum(url):
     return hash_md5.hexdigest()
 
 
-class DebianBuilder:
-    template = "PKGBUILD.debian.j2"
+def check_result(result, exit_on_error=True):
+    if result.returncode != 0:
+        print(huepy.bad("Error"))
+        print(huepy.bad(result.stderr))
 
+        if exit_on_error:
+            sys.exit(1)
+
+
+class Builder:
     def update_package_definition(self, package):
         if "i686" in package["arch"]:
             source_i686 = package["sources"]["i686"]["url"].format(**package)
             package["sources"]["i686"]["url"] = source_i686
             package["sources"]["i686"]["md5sum"] = md5sum(source_i686)
-
         if "x86_64" in package["arch"]:
             source_x86_64 = package["sources"]["x86_64"]["url"].format(**package)
             package["sources"]["x86_64"]["url"] = source_x86_64
             package["sources"]["x86_64"]["md5sum"] = md5sum(source_x86_64)
 
 
-class PythonVirtualenvBuilder:
+class DebianBuilder(Builder):
+    template = "PKGBUILD.debian.j2"
+
+
+class PythonVirtualenvBuilder(Builder):
     template = "PKGBUILD.python-virtualenv.j2"
 
     def update_package_definition(self, package):
+        # We don't need this.
         pass
 
 
-BUILDERS = {"debian": DebianBuilder, "python-virtualenv": PythonVirtualenvBuilder}
+BUILDERS = {
+    "debian": DebianBuilder,
+    "python-virtualenv": PythonVirtualenvBuilder,
+}
 
 print(huepy.run(f"Using {package['builder']['type']} builder"))
 builder = BUILDERS[package["builder"]["type"]]()
@@ -90,5 +105,33 @@ if result.returncode != 0:
     print(huepy.bad("Error writing .SRCINFO file"))
     print(result.stderr)
     print(result.stdout)
+else:
+    print(huepy.good("Build finished"))
 
-print(huepy.good("Build finished"))
+subprocess.run("sudo pacman -Syy", shell=True, capture_output=False)
+print(huepy.info("Testing: makepkg"))
+check_result(
+    subprocess.run("makepkg --noconfirm -Acs", shell=True, cwd=build_path, capture_output=False)
+)
+print(huepy.info("Testing: pacman -S --noconfirm"))
+check_result(
+    subprocess.run(
+        "sudo pacman -U --noconfirm *.pkg.tar.zst",
+        shell=True,
+        cwd=build_path,
+        capture_output=False,
+    )
+)
+if "test" in package:
+    subprocess.run("ls /usr/local/bin", shell=True)
+    print(huepy.info(f"Testing: {package['test']['command']}"))
+    check_result(
+        subprocess.run(
+            f"{package['test']['command']}",
+            shell=True,
+            cwd=build_path,
+            capture_output=False,
+        )
+    )
+
+print(huepy.good("Test successful"))