diff --git a/wip-duuqnd/user-side-compiler/package.lisp b/wip-duuqnd/user-side-compiler/package.lisp
index de9d877..0255697 100644
--- a/wip-duuqnd/user-side-compiler/package.lisp
+++ b/wip-duuqnd/user-side-compiler/package.lisp
@@ -7,8 +7,8 @@
 (defpackage #:user-side-compiler
   (:nicknames #:usc)
   (:local-nicknames (#:tlk #:user-side-compiler/toolkit))
+  (:use #:cl)
   (:export #:usc-init #:compile-string-to-bytes
            ;; Errors
            #:usc-error #:tokenizer-error #:missing-function-error
            #:parser-error))
-  (:use #:cl))
diff --git a/wip-duuqnd/user-side-compiler/example-0.c6l b/wip-duuqnd/user-side-compiler/tests/example-0.c6l
similarity index 100%
rename from wip-duuqnd/user-side-compiler/example-0.c6l
rename to wip-duuqnd/user-side-compiler/tests/example-0.c6l
diff --git a/wip-duuqnd/user-side-compiler/example-1.c6l b/wip-duuqnd/user-side-compiler/tests/example-1.c6l
similarity index 100%
rename from wip-duuqnd/user-side-compiler/example-1.c6l
rename to wip-duuqnd/user-side-compiler/tests/example-1.c6l
diff --git a/wip-duuqnd/user-side-compiler/example-2.c6l b/wip-duuqnd/user-side-compiler/tests/example-2.c6l
similarity index 100%
rename from wip-duuqnd/user-side-compiler/example-2.c6l
rename to wip-duuqnd/user-side-compiler/tests/example-2.c6l
diff --git a/wip-duuqnd/user-side-compiler/example-3.c6l b/wip-duuqnd/user-side-compiler/tests/example-3.c6l
similarity index 100%
rename from wip-duuqnd/user-side-compiler/example-3.c6l
rename to wip-duuqnd/user-side-compiler/tests/example-3.c6l
diff --git a/wip-duuqnd/user-side-compiler/example-4.c6l b/wip-duuqnd/user-side-compiler/tests/example-4.c6l
similarity index 100%
rename from wip-duuqnd/user-side-compiler/example-4.c6l
rename to wip-duuqnd/user-side-compiler/tests/example-4.c6l
diff --git a/wip-duuqnd/user-side-compiler/example-5.c6l b/wip-duuqnd/user-side-compiler/tests/example-5.c6l
similarity index 100%
rename from wip-duuqnd/user-side-compiler/example-5.c6l
rename to wip-duuqnd/user-side-compiler/tests/example-5.c6l
diff --git a/wip-duuqnd/user-side-compiler/example-6.c6l b/wip-duuqnd/user-side-compiler/tests/example-6.c6l
similarity index 100%
rename from wip-duuqnd/user-side-compiler/example-6.c6l
rename to wip-duuqnd/user-side-compiler/tests/example-6.c6l
diff --git a/wip-duuqnd/user-side-compiler/tests/invalid-exprs-1.c6l b/wip-duuqnd/user-side-compiler/tests/invalid-exprs-1.c6l
new file mode 100644
index 0000000..bdf8143
--- /dev/null
+++ b/wip-duuqnd/user-side-compiler/tests/invalid-exprs-1.c6l
@@ -0,0 +1 @@
+dbg_print(5 => 3)
\ No newline at end of file
diff --git a/wip-duuqnd/user-side-compiler/tests/package.lisp b/wip-duuqnd/user-side-compiler/tests/package.lisp
new file mode 100644
index 0000000..3ddfa26
--- /dev/null
+++ b/wip-duuqnd/user-side-compiler/tests/package.lisp
@@ -0,0 +1,4 @@
+(cl:in-package #:cl-user)
+
+(defpackage #:user-side-compiler/test
+  (:use #:cl #:parachute))
diff --git a/wip-duuqnd/user-side-compiler/tests/syntax-error-1.c6l b/wip-duuqnd/user-side-compiler/tests/syntax-error-1.c6l
new file mode 100644
index 0000000..1468185
--- /dev/null
+++ b/wip-duuqnd/user-side-compiler/tests/syntax-error-1.c6l
@@ -0,0 +1,2 @@
+# Should fail due to the missing commas
+dbg_print(5 3 1)
\ No newline at end of file
diff --git a/wip-duuqnd/user-side-compiler/tests/syntax-error-2.c6l b/wip-duuqnd/user-side-compiler/tests/syntax-error-2.c6l
new file mode 100644
index 0000000..dac32f7
--- /dev/null
+++ b/wip-duuqnd/user-side-compiler/tests/syntax-error-2.c6l
@@ -0,0 +1,2 @@
+# Should fail due to the lack of closing parentheses
+test_2((5 + 6 + 7
\ No newline at end of file
diff --git a/wip-duuqnd/user-side-compiler/tests/syntax-error-3.c6l b/wip-duuqnd/user-side-compiler/tests/syntax-error-3.c6l
new file mode 100644
index 0000000..e6177c3
--- /dev/null
+++ b/wip-duuqnd/user-side-compiler/tests/syntax-error-3.c6l
@@ -0,0 +1 @@
+x = 1 + 5 + 6 + if
\ No newline at end of file
diff --git a/wip-duuqnd/user-side-compiler/tests/syntax-error-4.c6l b/wip-duuqnd/user-side-compiler/tests/syntax-error-4.c6l
new file mode 100644
index 0000000..273e35f
--- /dev/null
+++ b/wip-duuqnd/user-side-compiler/tests/syntax-error-4.c6l
@@ -0,0 +1,3 @@
+for x from 0 to 12 do
+    test()
+end
\ No newline at end of file
diff --git a/wip-duuqnd/user-side-compiler/tests/syntax-error-5.c6l b/wip-duuqnd/user-side-compiler/tests/syntax-error-5.c6l
new file mode 100644
index 0000000..e3f652c
--- /dev/null
+++ b/wip-duuqnd/user-side-compiler/tests/syntax-error-5.c6l
@@ -0,0 +1,3 @@
+if x == 5 then
+   test()
+en
\ No newline at end of file
diff --git a/wip-duuqnd/user-side-compiler/tests/unit-tests.lisp b/wip-duuqnd/user-side-compiler/tests/unit-tests.lisp
new file mode 100644
index 0000000..9c23885
--- /dev/null
+++ b/wip-duuqnd/user-side-compiler/tests/unit-tests.lisp
@@ -0,0 +1,39 @@
+(in-package #:user-side-compiler/test)
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (use-package '#:parachute))
+
+(defun load-example (name)
+  (uiop:read-file-string
+   (let ((default (asdf:system-relative-pathname
+                   '#:user-side-compiler/test name)))
+     (make-pathname
+      :defaults default
+      :directory (append (pathname-directory default) '("tests"))))))
+
+(define-test should-compile ()
+  (let ((*debug-io* (make-string-output-stream)))
+    (loop :for test :in '("example-1.c6l" "example-2.c6l" "example-3.c6l"
+                          "example-4.c6l" "example-5.c6l" "example-6.c6l")
+          :do (true
+               (> (length (handler-bind
+                              ((usc:missing-function-error #'continue))
+                            (usc:compile-string-to-bytes (load-example test))))
+                  0)
+               test))))
+
+(define-test should-not-compile)
+
+(define-test syntax-errors
+  :parent should-not-compile
+  (let ((*debug-io* (make-string-output-stream)))
+    (loop :for test :in '("syntax-error-1.c6l" "syntax-error-2.c6l"
+                          "syntax-error-3.c6l" "syntax-error-4.c6l"
+                          "syntax-error-5.c6l")
+          :do (multiple-value-bind (ignore condition)
+                  (ignore-errors
+                   (handler-bind
+                       ((usc:missing-function-error #'continue))
+                     (usc:compile-string-to-bytes (load-example test))))
+                (declare (ignore ignore))
+                (of-type usc:parser-error condition test)))))
diff --git a/wip-duuqnd/user-side-compiler/user-side-compiler.asd b/wip-duuqnd/user-side-compiler/user-side-compiler.asd
index 7974f7c..16a53bf 100644
--- a/wip-duuqnd/user-side-compiler/user-side-compiler.asd
+++ b/wip-duuqnd/user-side-compiler/user-side-compiler.asd
@@ -3,6 +3,7 @@
 (defsystem #:user-side-compiler
   :serial t
   :depends-on (#:closer-mop #:alexandria #:trivial-backtrace)
+  :in-order-to ((asdf:test-op (asdf:test-op #:user-side-compiler/test)))
   :components
   ((:file "package")
    (:file "error-handling")
@@ -39,3 +40,14 @@
                  (:file "code-generator")))
    (:file "interface")
    (:file "binary-test-build")))
+
+(defsystem #:user-side-compiler/test
+  :depends-on (#:user-side-compiler #:parachute)
+  :perform (asdf:test-op
+            (op c)
+            (uiop:symbol-call :parachute :test :user-side-compiler/test))
+  :components
+  ((:module "tests"
+    :serial t
+    :components ((:file "package")
+                 (:file "unit-tests")))))