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diff --git a/tests/suite/syntax/comment.typ b/tests/suite/syntax/comment.typ
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+// Test line and block comments.
+
+--- comments ---
+// Line comment acts as spacing.
+A// you
+B
+
+// Block comment does not act as spacing, nested block comments.
+C/*
+ /* */
+*/D
+
+// Works in code.
+#test(type(/*1*/ 1) //
+, int)
+
+// End of block comment in line comment.
+// Hello */
+
+// Nested "//" doesn't count as line comment.
+/* // */
+E
+
+/*//*/
+This is a comment.
+*/*/
+
+--- comment-end-of-line ---
+// Test comments at the end of a line
+First part//
+Second part
+
+// Test comments at the end of a line with pre-spacing
+First part          //
+Second part
+
+--- comment-block-unclosed ---
+// End should not appear without start.
+// Error: 7-9 unexpected end of block comment
+/* */ */
+
+// Unterminated is okay.
+/*