diff --git a/tests/data/hash_all/config.json b/tests/data/hash_all/config.json
new file mode 100644
index 0000000..1ecc52c
--- /dev/null
+++ b/tests/data/hash_all/config.json
@@ -0,0 +1,4 @@
+{
+    "language": "plaintext",
+    "sequence_length": 2
+}
diff --git a/tests/data/hash_all/submission.txt b/tests/data/hash_all/submission.txt
new file mode 100644
index 0000000..2100e54
--- /dev/null
+++ b/tests/data/hash_all/submission.txt
@@ -0,0 +1,4 @@
+int x = 8;
+int y = 3;
+int z = x + y;
+int t = 2 * x + y;
diff --git a/tests/data/hash_all/tokens.json b/tests/data/hash_all/tokens.json
new file mode 100644
index 0000000..98b2040
--- /dev/null
+++ b/tests/data/hash_all/tokens.json
@@ -0,0 +1,158 @@
+[
+    {
+        "char": 1,
+        "line": 1,
+        "type": "string",
+        "value": "int"
+    },
+    {
+        "char": 5,
+        "line": 1,
+        "type": "string",
+        "value": "x"
+    },
+    {
+        "char": 7,
+        "line": 1,
+        "type": "punctuation",
+        "value": "="
+    },
+    {
+        "char": 9,
+        "line": 1,
+        "type": "number",
+        "value": 8
+    },
+    {
+        "char": 10,
+        "line": 1,
+        "type": "punctuation",
+        "value": ";"
+    },
+    {
+        "char": 1,
+        "line": 2,
+        "type": "string",
+        "value": "int"
+    },
+    {
+        "char": 5,
+        "line": 2,
+        "type": "string",
+        "value": "y"
+    },
+    {
+        "char": 7,
+        "line": 2,
+        "type": "punctuation",
+        "value": "="
+    },
+    {
+        "char": 9,
+        "line": 2,
+        "type": "number",
+        "value": 3
+    },
+    {
+        "char": 10,
+        "line": 2,
+        "type": "punctuation",
+        "value": ";"
+    },
+    {
+        "char": 1,
+        "line": 3,
+        "type": "string",
+        "value": "int"
+    },
+    {
+        "char": 5,
+        "line": 3,
+        "type": "string",
+        "value": "z"
+    },
+    {
+        "char": 7,
+        "line": 3,
+        "type": "punctuation",
+        "value": "="
+    },
+    {
+        "char": 9,
+        "line": 3,
+        "type": "string",
+        "value": "x"
+    },
+    {
+        "char": 11,
+        "line": 3,
+        "type": "punctuation",
+        "value": "+"
+    },
+    {
+        "char": 13,
+        "line": 3,
+        "type": "string",
+        "value": "y"
+    },
+    {
+        "char": 14,
+        "line": 3,
+        "type": "punctuation",
+        "value": ";"
+    },
+    {
+        "char": 1,
+        "line": 4,
+        "type": "string",
+        "value": "int"
+    },
+    {
+        "char": 5,
+        "line": 4,
+        "type": "string",
+        "value": "t"
+    },
+    {
+        "char": 7,
+        "line": 4,
+        "type": "punctuation",
+        "value": "="
+    },
+    {
+        "char": 9,
+        "line": 4,
+        "type": "number",
+        "value": 2
+    },
+    {
+        "char": 11,
+        "line": 4,
+        "type": "punctuation",
+        "value": "*"
+    },
+    {
+        "char": 13,
+        "line": 4,
+        "type": "string",
+        "value": "x"
+    },
+    {
+        "char": 15,
+        "line": 4,
+        "type": "punctuation",
+        "value": "+"
+    },
+    {
+        "char": 17,
+        "line": 4,
+        "type": "string",
+        "value": "y"
+    },
+    {
+        "char": 18,
+        "line": 4,
+        "type": "punctuation",
+        "value": ";"
+    }
+]
diff --git a/tests/tests.py b/tests/tests.py
index 13cff79..9257d05 100644
--- a/tests/tests.py
+++ b/tests/tests.py
@@ -1,6 +1,7 @@
 import unittest
 import os
 import shutil
+import json
 
 lichen_installation_dir = "/usr/local/submitty/Lichen"
 lichen_test_playground = "/usr/local/submitty/Lichen/test_output"
@@ -132,5 +133,62 @@ def testMIPSTokenizer(self):
         self.assertEqual(actual_output, expected_output)
 
 
+class TestHashAll(unittest.TestCase):
+    def setUp(self):
+        if not os.path.isdir(lichen_test_playground):
+            os.makedirs(lichen_test_playground)
+
+    def tearDown(self):
+        shutil.rmtree(lichen_test_playground)
+
+    def testHashAll(self):
+        # make the fake directory structure hash_all.py expects
+        os.makedirs(f"{lichen_test_playground}/test_hash_all/provided_code")
+        os.makedirs(f"{lichen_test_playground}/test_hash_all/other_gradeables")
+        os.makedirs(f"{lichen_test_playground}/test_hash_all/users/student/1")
+        open(f"{lichen_test_playground}/test_hash_all/config.json", 'a').close()
+        open(f"{lichen_test_playground}/test_hash_all/users/student/1/tokens.json", 'a').close()
+        with open(f"{lichen_test_playground}/test_hash_all/provided_code/tokens.json", 'w') as file:
+            file.write("null")
+
+        # copy the input files from /data to the the new path
+        shutil.copyfile("data/hash_all/config.json", f"{lichen_test_playground}/test_hash_all/config.json")
+        shutil.copyfile("data/hash_all/tokens.json", f"{lichen_test_playground}/test_hash_all/users/student/1/tokens.json")
+
+        # save current working directory
+        cwd = os.getcwd()
+
+        # run hash_all
+        os.chdir(f"{lichen_installation_dir}/bin")
+        os.system(f"python3 {lichen_installation_dir}/bin/hash_all.py {lichen_test_playground}/test_hash_all > /dev/null")
+        os.chdir(cwd)
+
+        # test output
+        hashes_file = f"{lichen_test_playground}/test_hash_all/users/student/1/hashes.txt"
+        with open(hashes_file, 'r') as file:
+            lines = file.readlines()
+        lines = [x.strip() for x in lines]
+        tokens_file = f"{lichen_test_playground}/test_hash_all/users/student/1/tokens.json"
+        with open(tokens_file, 'r') as file:
+            tokens = json.load(file)
+
+        # make sure the number of sequences and the number of hashes are the same
+        self.assertEqual(len(lines), len(tokens) - 2 + 1)
+
+        # make sure the same sequences hash to the same string, and
+        # that different sequences hash to different strings
+        for i in range(0, len(lines)):
+            for j in range(i + 1, len(lines)):
+                if i == 4 and j == 9\
+                 or i == 4 and j == 16\
+                 or i == 9 and j == 16\
+                 or i == 13 and j == 22\
+                 or i == 14 and j == 23\
+                 or i == 15 and j == 24:
+                    self.assertEqual(lines[i], lines[j])
+                else:
+                    self.assertNotEqual(lines[i], lines[j])
+
+
 if __name__ == '__main__':
     unittest.main()