diff --git a/Makefile b/Makefile
index f08cf35..9bdf7d0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 EMACS ?= emacs
-BATCH = $(EMACS) -Q -batch -L .
+BATCH = $(EMACS) -Q -batch -L . -L test
 
 .PHONY: all compile test lint clean
 
diff --git a/test/test-ob-elixir-core.el b/test/test-ob-elixir-core.el
new file mode 100644
index 0000000..2e13506
--- /dev/null
+++ b/test/test-ob-elixir-core.el
@@ -0,0 +1,62 @@
+;;; test-ob-elixir-core.el --- Core execution tests -*- lexical-binding: t; -*-
+
+;;; Commentary:
+
+;; Core execution tests for ob-elixir package.
+
+;;; Code:
+
+(require 'ert)
+(require 'ob-elixir)
+
+;;; Command Tests
+
+(ert-deftest ob-elixir-test-elixir-available ()
+  "Test that Elixir is available."
+  (should (executable-find ob-elixir-command)))
+
+;;; Basic Execution Tests
+
+(ert-deftest ob-elixir-test-simple-value ()
+  "Test simple value evaluation."
+  (skip-unless (executable-find ob-elixir-command))
+  (let ((result (ob-elixir--execute "1 + 1" 'value)))
+    (should (equal "2" result))))
+
+(ert-deftest ob-elixir-test-simple-output ()
+  "Test simple output evaluation."
+  (skip-unless (executable-find ob-elixir-command))
+  (let ((result (ob-elixir--execute "IO.puts(\"hello\")" 'output)))
+    (should (equal "hello" result))))
+
+(ert-deftest ob-elixir-test-multiline-value ()
+  "Test multiline code value evaluation."
+  (skip-unless (executable-find ob-elixir-command))
+  (let ((result (ob-elixir--execute "x = 10\ny = 20\nx + y" 'value)))
+    (should (equal "30" result))))
+
+(ert-deftest ob-elixir-test-list-result ()
+  "Test list result."
+  (skip-unless (executable-find ob-elixir-command))
+  (let ((result (ob-elixir--execute "[1, 2, 3]" 'value)))
+    (should (equal "[1, 2, 3]" result))))
+
+(ert-deftest ob-elixir-test-map-result ()
+  "Test map result."
+  (skip-unless (executable-find ob-elixir-command))
+  (let ((result (ob-elixir--execute "%{a: 1, b: 2}" 'value)))
+    ;; Maps are unordered in Elixir, so accept either order
+    (should (or (string-match-p "%{a: 1, b: 2}" result)
+                (string-match-p "%{b: 2, a: 1}" result)))))
+
+;;; Wrapper Tests
+
+(ert-deftest ob-elixir-test-wrap-for-value ()
+  "Test value wrapper generation."
+  (let ((wrapped (ob-elixir--wrap-for-value "1 + 1")))
+    (should (string-match-p "result = " wrapped))
+    (should (string-match-p "IO\\.puts" wrapped))
+    (should (string-match-p "inspect" wrapped))))
+
+(provide 'test-ob-elixir-core)
+;;; test-ob-elixir-core.el ends here
diff --git a/test/test-ob-elixir-errors.el b/test/test-ob-elixir-errors.el
new file mode 100644
index 0000000..926fb39
--- /dev/null
+++ b/test/test-ob-elixir-errors.el
@@ -0,0 +1,58 @@
+;;; test-ob-elixir-errors.el --- Error handling tests -*- lexical-binding: t; -*-
+
+;;; Commentary:
+
+;; Error handling and detection tests for ob-elixir package.
+
+;;; Code:
+
+(require 'ert)
+(require 'ob-elixir)
+
+;;; Error Detection Tests
+
+(ert-deftest ob-elixir-test-detect-runtime-error ()
+  "Test runtime error detection."
+  (let ((output "** (RuntimeError) something went wrong"))
+    (let ((error-info (ob-elixir--detect-error output)))
+      (should error-info)
+      (should (eq 'runtime (plist-get error-info :type)))
+      (should (equal "RuntimeError" (plist-get error-info :error-type))))))
+
+(ert-deftest ob-elixir-test-detect-compile-error ()
+  "Test compile error detection."
+  (let ((output "** (CompileError) test.exs:1: undefined function foo/0"))
+    (let ((error-info (ob-elixir--detect-error output)))
+      (should error-info)
+      (should (eq 'compile (plist-get error-info :type)))
+      (should (equal "CompileError" (plist-get error-info :error-type))))))
+
+(ert-deftest ob-elixir-test-no-error ()
+  "Test that valid output is not detected as error."
+  (should-not (ob-elixir--detect-error "42"))
+  (should-not (ob-elixir--detect-error "[1, 2, 3]"))
+  (should-not (ob-elixir--detect-error "\"hello\"")))
+
+(ert-deftest ob-elixir-test-error-execution ()
+  "Test that errors are properly handled during execution."
+  (skip-unless (executable-find ob-elixir-command))
+  (let ((ob-elixir-signal-errors nil))
+    (let ((result (ob-elixir--execute "raise \"test error\"" 'value)))
+      (should (string-match-p "RuntimeError" result)))))
+
+(ert-deftest ob-elixir-test-error-signaling ()
+  "Test that errors are signaled when configured."
+  (skip-unless (executable-find ob-elixir-command))
+  (let ((ob-elixir-signal-errors t))
+    (should-error (ob-elixir--execute "raise \"test error\"" 'value)
+                  :type 'ob-elixir-runtime-error)))
+
+(ert-deftest ob-elixir-test-undefined-function ()
+  "Test handling of undefined function error."
+  (skip-unless (executable-find ob-elixir-command))
+  (let ((ob-elixir-signal-errors nil))
+    (let ((result (ob-elixir--execute "undefined_function()" 'value)))
+      (should (string-match-p "\\(UndefinedFunctionError\\|CompileError\\)" result)))))
+
+(provide 'test-ob-elixir-errors)
+;;; test-ob-elixir-errors.el ends here
diff --git a/test/test-ob-elixir-org.el b/test/test-ob-elixir-org.el
new file mode 100644
index 0000000..fcb0080
--- /dev/null
+++ b/test/test-ob-elixir-org.el
@@ -0,0 +1,71 @@
+;;; test-ob-elixir-org.el --- Org integration tests -*- lexical-binding: t; -*-
+
+;;; Commentary:
+
+;; Org-mode integration tests for ob-elixir package.
+
+;;; Code:
+
+(require 'ert)
+(require 'org)
+(require 'ob)
+(require 'ob-elixir)
+
+;;; Helper Functions
+
+(defun ob-elixir-test--ensure-org-babel-loaded ()
+  "Ensure org-babel is loaded with Elixir support."
+  (setq org-confirm-babel-evaluate nil)
+  (org-babel-do-load-languages
+   'org-babel-load-languages
+   '((elixir . t))))
+
+(defun ob-elixir-test--execute-src-block (code &optional header-args)
+  "Execute CODE as an Elixir src block with HEADER-ARGS."
+  (ob-elixir-test--ensure-org-babel-loaded)
+  (let ((org-confirm-babel-evaluate nil))
+    (with-temp-buffer
+      (org-mode)
+      (insert (format "#+BEGIN_SRC elixir%s\n%s\n#+END_SRC"
+                      (if header-args (concat " " header-args) "")
+                      code))
+      (goto-char (point-min))
+      (forward-line 1)
+      (org-babel-execute-src-block))))
+
+;;; Basic Org Tests
+
+(ert-deftest ob-elixir-test-org-simple ()
+  "Test simple org block execution."
+  (skip-unless (executable-find ob-elixir-command))
+  (should (equal "2" (ob-elixir-test--execute-src-block "1 + 1"))))
+
+(ert-deftest ob-elixir-test-org-with-var ()
+  "Test org block execution with variable."
+  (skip-unless (executable-find ob-elixir-command))
+  (should (equal "20" (ob-elixir-test--execute-src-block "x * 2" ":var x=10"))))
+
+(ert-deftest ob-elixir-test-org-results-output ()
+  "Test org block with :results output."
+  (skip-unless (executable-find ob-elixir-command))
+  (should (equal "hello" 
+                 (ob-elixir-test--execute-src-block 
+                  "IO.puts(\"hello\")" 
+                  ":results output"))))
+
+(ert-deftest ob-elixir-test-org-results-value ()
+  "Test org block with :results value."
+  (skip-unless (executable-find ob-elixir-command))
+  (should (equal '(1 2 3) 
+                 (ob-elixir-test--execute-src-block 
+                  "[1, 2, 3]" 
+                  ":results value"))))
+
+(ert-deftest ob-elixir-test-org-table-result ()
+  "Test org block returning table."
+  (skip-unless (executable-find ob-elixir-command))
+  (let ((result (ob-elixir-test--execute-src-block "[[1, 2], [3, 4]]")))
+    (should (equal '((1 2) (3 4)) result))))
+
+(provide 'test-ob-elixir-org)
+;;; test-ob-elixir-org.el ends here
diff --git a/test/test-ob-elixir-results.el b/test/test-ob-elixir-results.el
new file mode 100644
index 0000000..f5b761c
--- /dev/null
+++ b/test/test-ob-elixir-results.el
@@ -0,0 +1,58 @@
+;;; test-ob-elixir-results.el --- Result formatting tests -*- lexical-binding: t; -*-
+
+;;; Commentary:
+
+;; Result formatting and table support tests for ob-elixir package.
+
+;;; Code:
+
+(require 'ert)
+(require 'ob-elixir)
+
+;;; Parsing Tests
+
+(ert-deftest ob-elixir-test-parse-simple-list ()
+  "Test parsing simple list result."
+  (should (equal '(1 2 3) (ob-elixir--table-or-string "[1, 2, 3]"))))
+
+(ert-deftest ob-elixir-test-parse-nested-list ()
+  "Test parsing nested list (table) result."
+  (should (equal '((1 2) (3 4))
+                 (ob-elixir--table-or-string "[[1, 2], [3, 4]]"))))
+
+(ert-deftest ob-elixir-test-parse-tuple ()
+  "Test parsing tuple result."
+  (should (equal '(1 2 3) (ob-elixir--table-or-string "{1, 2, 3}"))))
+
+(ert-deftest ob-elixir-test-parse-scalar ()
+  "Test that scalars are returned as strings."
+  (should (equal "42" (ob-elixir--table-or-string "42")))
+  (should (equal ":ok" (ob-elixir--table-or-string ":ok"))))
+
+(ert-deftest ob-elixir-test-parse-string ()
+  "Test parsing string result."
+  (should (equal "\"hello\"" (ob-elixir--table-or-string "\"hello\""))))
+
+(ert-deftest ob-elixir-test-sanitize-table-nil ()
+  "Test that nil values are sanitized in tables."
+  (let ((ob-elixir-nil-to 'hline))
+    (should (equal '((1 hline) (hline 2))
+                   (ob-elixir--sanitize-table '((1 nil) (nil 2)))))))
+
+(ert-deftest ob-elixir-test-execution-returns-table ()
+  "Test that list results become tables."
+  (skip-unless (executable-find ob-elixir-command))
+  (let ((result (ob-elixir--table-or-string
+                 (ob-elixir--execute "[[1, 2], [3, 4]]" 'value))))
+    (should (equal '((1 2) (3 4)) result))))
+
+(ert-deftest ob-elixir-test-mixed-list ()
+  "Test parsing mixed-type list."
+  (skip-unless (executable-find ob-elixir-command))
+  (let ((result (ob-elixir--table-or-string
+                 (ob-elixir--execute "[1, \"two\", :three]" 'value))))
+    (should (listp result))
+    (should (= 3 (length result)))))
+
+(provide 'test-ob-elixir-results)
+;;; test-ob-elixir-results.el ends here
diff --git a/test/test-ob-elixir-vars.el b/test/test-ob-elixir-vars.el
new file mode 100644
index 0000000..545f2d1
--- /dev/null
+++ b/test/test-ob-elixir-vars.el
@@ -0,0 +1,90 @@
+;;; test-ob-elixir-vars.el --- Variable handling tests -*- lexical-binding: t; -*-
+
+;;; Commentary:
+
+;; Variable handling and type conversion tests for ob-elixir package.
+
+;;; Code:
+
+(require 'ert)
+(require 'ob-elixir)
+
+;;; Type Conversion Tests
+
+(ert-deftest ob-elixir-test-convert-nil ()
+  "Test nil conversion."
+  (should (equal "nil" (ob-elixir--elisp-to-elixir nil))))
+
+(ert-deftest ob-elixir-test-convert-true ()
+  "Test t conversion."
+  (should (equal "true" (ob-elixir--elisp-to-elixir t))))
+
+(ert-deftest ob-elixir-test-convert-integer ()
+  "Test integer conversion."
+  (should (equal "42" (ob-elixir--elisp-to-elixir 42)))
+  (should (equal "-10" (ob-elixir--elisp-to-elixir -10))))
+
+(ert-deftest ob-elixir-test-convert-float ()
+  "Test float conversion."
+  (should (equal "3.14" (ob-elixir--elisp-to-elixir 3.14))))
+
+(ert-deftest ob-elixir-test-convert-string ()
+  "Test string conversion."
+  (should (equal "\"hello\"" (ob-elixir--elisp-to-elixir "hello"))))
+
+(ert-deftest ob-elixir-test-convert-string-escaping ()
+  "Test string escaping."
+  (should (equal "\"say \\\"hi\\\"\"" 
+                 (ob-elixir--elisp-to-elixir "say \"hi\"")))
+  (should (equal "\"line1\\nline2\"" 
+                 (ob-elixir--elisp-to-elixir "line1\nline2"))))
+
+(ert-deftest ob-elixir-test-convert-symbol ()
+  "Test symbol conversion to atom."
+  (should (equal ":foo" (ob-elixir--elisp-to-elixir 'foo)))
+  (should (equal ":ok" (ob-elixir--elisp-to-elixir 'ok))))
+
+(ert-deftest ob-elixir-test-convert-list ()
+  "Test list conversion."
+  (should (equal "[1, 2, 3]" (ob-elixir--elisp-to-elixir '(1 2 3))))
+  (should (equal "[\"a\", \"b\"]" (ob-elixir--elisp-to-elixir '("a" "b")))))
+
+(ert-deftest ob-elixir-test-convert-nested-list ()
+  "Test nested list conversion."
+  (should (equal "[[1, 2], [3, 4]]" 
+                 (ob-elixir--elisp-to-elixir '((1 2) (3 4))))))
+
+(ert-deftest ob-elixir-test-convert-vector ()
+  "Test vector to tuple conversion."
+  (should (equal "{1, 2, 3}" (ob-elixir--elisp-to-elixir [1 2 3]))))
+
+;;; Variable Assignment Tests
+
+(ert-deftest ob-elixir-test-variable-assignments ()
+  "Test variable assignment generation."
+  (let ((params '((:var . ("x" . 5))
+                  (:var . ("name" . "Alice")))))
+    (let ((assignments (org-babel-variable-assignments:elixir params)))
+      (should (member "x = 5" assignments))
+      (should (member "name = \"Alice\"" assignments)))))
+
+(ert-deftest ob-elixir-test-var-execution ()
+  "Test code execution with variables."
+  (skip-unless (executable-find ob-elixir-command))
+  (let* ((params '((:var . ("x" . 10))))
+         (var-lines (org-babel-variable-assignments:elixir params))
+         (full-body (concat (mapconcat #'identity var-lines "\n")
+                            "\nx * 2")))
+    (should (equal "20" (ob-elixir--execute full-body 'value)))))
+
+(ert-deftest ob-elixir-test-var-list ()
+  "Test passing list as variable."
+  (skip-unless (executable-find ob-elixir-command))
+  (let* ((params '((:var . ("data" . (1 2 3)))))
+         (var-lines (org-babel-variable-assignments:elixir params))
+         (full-body (concat (mapconcat #'identity var-lines "\n")
+                            "\nEnum.sum(data)")))
+    (should (equal "6" (ob-elixir--execute full-body 'value)))))
+
+(provide 'test-ob-elixir-vars)
+;;; test-ob-elixir-vars.el ends here
diff --git a/test/test-ob-elixir.el b/test/test-ob-elixir.el
index 4b5724c..a3eb495 100644
--- a/test/test-ob-elixir.el
+++ b/test/test-ob-elixir.el
@@ -2,224 +2,40 @@
 
 ;;; Commentary:
 
-;; Test suite for ob-elixir package.
+;; Main test file that loads all test modules.
+;; Run with: make test
+;; Or: emacs -batch -l ert -l test/test-ob-elixir.el -f ert-run-tests-batch-and-exit
 
 ;;; Code:
 
 (require 'ert)
 
-;; Add parent directory to load path
+;; Add source directory to load path
 (let ((dir (file-name-directory (or load-file-name buffer-file-name))))
-  (add-to-list 'load-path (expand-file-name ".." dir)))
+  (add-to-list 'load-path (expand-file-name ".." dir))
+  (add-to-list 'load-path dir))
 
+;; Load the package
 (require 'ob-elixir)
 
+;; Load test modules
+(require 'test-ob-elixir-core)
+(require 'test-ob-elixir-vars)
+(require 'test-ob-elixir-results)
+(require 'test-ob-elixir-errors)
+(require 'test-ob-elixir-org)
+
+;;; Smoke Test
+
+(ert-deftest ob-elixir-test-smoke ()
+  "Basic smoke test - package loads and functions are defined."
+  (should (featurep 'ob-elixir))
+  (should (fboundp 'org-babel-execute:elixir))
+  (should (boundp 'org-babel-default-header-args:elixir)))
+
 (ert-deftest ob-elixir-test-package-loads ()
   "Test that the package loads successfully."
   (should (featurep 'ob-elixir)))
 
-(ert-deftest ob-elixir-test-elixir-available ()
-  "Test that Elixir is available."
-  (should (executable-find ob-elixir-command)))
-
-(ert-deftest ob-elixir-test-simple-value ()
-  "Test simple value evaluation."
-  (skip-unless (executable-find ob-elixir-command))
-  (let ((result (ob-elixir--execute "1 + 1" 'value)))
-    (should (equal "2" result))))
-
-(ert-deftest ob-elixir-test-simple-output ()
-  "Test simple output evaluation."
-  (skip-unless (executable-find ob-elixir-command))
-  (let ((result (ob-elixir--execute "IO.puts(\"hello\")" 'output)))
-    (should (equal "hello" result))))
-
-(ert-deftest ob-elixir-test-multiline-value ()
-  "Test multiline code value evaluation."
-  (skip-unless (executable-find ob-elixir-command))
-  (let ((result (ob-elixir--execute "x = 10\ny = 20\nx + y" 'value)))
-    (should (equal "30" result))))
-
-(ert-deftest ob-elixir-test-list-result ()
-  "Test list result."
-  (skip-unless (executable-find ob-elixir-command))
-  (let ((result (ob-elixir--execute "[1, 2, 3]" 'value)))
-    (should (equal "[1, 2, 3]" result))))
-
-(ert-deftest ob-elixir-test-map-result ()
-  "Test map result."
-  (skip-unless (executable-find ob-elixir-command))
-  (let ((result (ob-elixir--execute "%{a: 1, b: 2}" 'value)))
-    ;; Maps are unordered in Elixir, so accept either order
-    (should (or (string-match-p "%{a: 1, b: 2}" result)
-                (string-match-p "%{b: 2, a: 1}" result)))))
-
-;;; Type Conversion Tests
-
-(ert-deftest ob-elixir-test-convert-nil ()
-  "Test nil conversion."
-  (should (equal "nil" (ob-elixir--elisp-to-elixir nil))))
-
-(ert-deftest ob-elixir-test-convert-true ()
-  "Test t conversion."
-  (should (equal "true" (ob-elixir--elisp-to-elixir t))))
-
-(ert-deftest ob-elixir-test-convert-integer ()
-  "Test integer conversion."
-  (should (equal "42" (ob-elixir--elisp-to-elixir 42)))
-  (should (equal "-10" (ob-elixir--elisp-to-elixir -10))))
-
-(ert-deftest ob-elixir-test-convert-float ()
-  "Test float conversion."
-  (should (equal "3.14" (ob-elixir--elisp-to-elixir 3.14))))
-
-(ert-deftest ob-elixir-test-convert-string ()
-  "Test string conversion."
-  (should (equal "\"hello\"" (ob-elixir--elisp-to-elixir "hello"))))
-
-(ert-deftest ob-elixir-test-convert-string-escaping ()
-  "Test string escaping."
-  (should (equal "\"say \\\"hi\\\"\"" 
-                 (ob-elixir--elisp-to-elixir "say \"hi\"")))
-  (should (equal "\"line1\\nline2\"" 
-                 (ob-elixir--elisp-to-elixir "line1\nline2"))))
-
-(ert-deftest ob-elixir-test-convert-symbol ()
-  "Test symbol conversion to atom."
-  (should (equal ":foo" (ob-elixir--elisp-to-elixir 'foo)))
-  (should (equal ":ok" (ob-elixir--elisp-to-elixir 'ok))))
-
-(ert-deftest ob-elixir-test-convert-list ()
-  "Test list conversion."
-  (should (equal "[1, 2, 3]" (ob-elixir--elisp-to-elixir '(1 2 3))))
-  (should (equal "[\"a\", \"b\"]" (ob-elixir--elisp-to-elixir '("a" "b")))))
-
-(ert-deftest ob-elixir-test-convert-nested-list ()
-  "Test nested list conversion."
-  (should (equal "[[1, 2], [3, 4]]" 
-                 (ob-elixir--elisp-to-elixir '((1 2) (3 4))))))
-
-(ert-deftest ob-elixir-test-convert-vector ()
-  "Test vector to tuple conversion."
-  (should (equal "{1, 2, 3}" (ob-elixir--elisp-to-elixir [1 2 3]))))
-
-;;; Variable Injection Tests
-
-(ert-deftest ob-elixir-test-variable-assignments ()
-  "Test variable assignment generation."
-  (let ((params '((:var . ("x" . 5))
-                  (:var . ("name" . "Alice")))))
-    (let ((assignments (org-babel-variable-assignments:elixir params)))
-      (should (member "x = 5" assignments))
-      (should (member "name = \"Alice\"" assignments)))))
-
-(ert-deftest ob-elixir-test-var-execution ()
-  "Test code execution with variables."
-  (skip-unless (executable-find ob-elixir-command))
-  (let* ((params '((:var . ("x" . 10))))
-         (var-lines (org-babel-variable-assignments:elixir params))
-         (full-body (concat (mapconcat #'identity var-lines "\n")
-                            "\nx * 2")))
-    (should (equal "20" (ob-elixir--execute full-body 'value)))))
-
-(ert-deftest ob-elixir-test-var-list ()
-  "Test passing list as variable."
-  (skip-unless (executable-find ob-elixir-command))
-  (let* ((params '((:var . ("data" . (1 2 3)))))
-         (var-lines (org-babel-variable-assignments:elixir params))
-         (full-body (concat (mapconcat #'identity var-lines "\n")
-                            "\nEnum.sum(data)")))
-    (should (equal "6" (ob-elixir--execute full-body 'value)))))
-
-;;; Error Handling Tests
-
-(ert-deftest ob-elixir-test-detect-runtime-error ()
-  "Test runtime error detection."
-  (let ((output "** (RuntimeError) something went wrong"))
-    (let ((error-info (ob-elixir--detect-error output)))
-      (should error-info)
-      (should (eq 'runtime (plist-get error-info :type)))
-      (should (equal "RuntimeError" (plist-get error-info :error-type))))))
-
-(ert-deftest ob-elixir-test-detect-compile-error ()
-  "Test compile error detection."
-  (let ((output "** (CompileError) test.exs:1: undefined function foo/0"))
-    (let ((error-info (ob-elixir--detect-error output)))
-      (should error-info)
-      (should (eq 'compile (plist-get error-info :type)))
-      (should (equal "CompileError" (plist-get error-info :error-type))))))
-
-(ert-deftest ob-elixir-test-no-error ()
-  "Test that valid output is not detected as error."
-  (should-not (ob-elixir--detect-error "42"))
-  (should-not (ob-elixir--detect-error "[1, 2, 3]"))
-  (should-not (ob-elixir--detect-error "\"hello\"")))
-
-(ert-deftest ob-elixir-test-error-execution ()
-  "Test that errors are properly handled during execution."
-  (skip-unless (executable-find ob-elixir-command))
-  (let ((ob-elixir-signal-errors nil))
-    (let ((result (ob-elixir--execute "raise \"test error\"" 'value)))
-      (should (string-match-p "RuntimeError" result)))))
-
-(ert-deftest ob-elixir-test-error-signaling ()
-  "Test that errors are signaled when configured."
-  (skip-unless (executable-find ob-elixir-command))
-  (let ((ob-elixir-signal-errors t))
-    (should-error (ob-elixir--execute "raise \"test error\"" 'value)
-                  :type 'ob-elixir-runtime-error)))
-
-(ert-deftest ob-elixir-test-undefined-function ()
-  "Test handling of undefined function error."
-  (skip-unless (executable-find ob-elixir-command))
-  (let ((ob-elixir-signal-errors nil))
-    (let ((result (ob-elixir--execute "undefined_function()" 'value)))
-      (should (string-match-p "\\(UndefinedFunctionError\\|CompileError\\)" result)))))
-
-;;; Result Formatting Tests
-
-(ert-deftest ob-elixir-test-parse-simple-list ()
-  "Test parsing simple list result."
-  (should (equal '(1 2 3) (ob-elixir--table-or-string "[1, 2, 3]"))))
-
-(ert-deftest ob-elixir-test-parse-nested-list ()
-  "Test parsing nested list (table) result."
-  (should (equal '((1 2) (3 4))
-                 (ob-elixir--table-or-string "[[1, 2], [3, 4]]"))))
-
-(ert-deftest ob-elixir-test-parse-tuple ()
-  "Test parsing tuple result."
-  (should (equal '(1 2 3) (ob-elixir--table-or-string "{1, 2, 3}"))))
-
-(ert-deftest ob-elixir-test-parse-scalar ()
-  "Test that scalars are returned as strings."
-  (should (equal "42" (ob-elixir--table-or-string "42")))
-  (should (equal ":ok" (ob-elixir--table-or-string ":ok"))))
-
-(ert-deftest ob-elixir-test-parse-string ()
-  "Test parsing string result."
-  (should (equal "\"hello\"" (ob-elixir--table-or-string "\"hello\""))))
-
-(ert-deftest ob-elixir-test-sanitize-table-nil ()
-  "Test that nil values are sanitized in tables."
-  (let ((ob-elixir-nil-to 'hline))
-    (should (equal '((1 hline) (hline 2))
-                   (ob-elixir--sanitize-table '((1 nil) (nil 2)))))))
-
-(ert-deftest ob-elixir-test-execution-returns-table ()
-  "Test that list results become tables."
-  (skip-unless (executable-find ob-elixir-command))
-  (let ((result (ob-elixir--table-or-string
-                 (ob-elixir--execute "[[1, 2], [3, 4]]" 'value))))
-    (should (equal '((1 2) (3 4)) result))))
-
-(ert-deftest ob-elixir-test-mixed-list ()
-  "Test parsing mixed-type list."
-  (skip-unless (executable-find ob-elixir-command))
-  (let ((result (ob-elixir--table-or-string
-                 (ob-elixir--execute "[1, \"two\", :three]" 'value))))
-    (should (listp result))
-    (should (= 3 (length result)))))
-
 (provide 'test-ob-elixir)
 ;;; test-ob-elixir.el ends here