diff --git a/tests/test_parse.py b/tests/test_parse.py
index 6446bf1..1e8f0a2 100644
--- a/tests/test_parse.py
+++ b/tests/test_parse.py
@@ -1,5 +1,5 @@
 from hypothesis import given, assume
-from hypothesis.strategies import text, booleans, sampled_from, characters
+from hypothesis.strategies import text, booleans, sampled_from, characters, lists
 
 from src import parse
 
@@ -124,6 +124,20 @@
     assert tokens[1].type == "EOF"
 
 
+# Test that reserved words aren't read without whitespace
+@given(lists(sampled_from(reserved_words), min_size=2))
+def test_lexer_conjoined_words(words):
+    word = "".join(words)
+    tokenizer = parse.Tokenizer(word, "")
+    tokens = tokenizer.tokenize()
+    assert tokens[0].type == "symbol"
+    assert tokens[0].value == word
+    assert tokens[0].location.line == 1
+    assert tokens[0].location.column == 1
+    assert tokens[0].location.file == ""
+    assert tokens[1].type == "EOF"
+
+
 # Test that shebangs are skipped
 @given(text(alphabet=characters(blacklist_characters="\n")))
 def test_lexer_shebang(shebang):