diff --git a/testing/drop_index.test b/testing/drop_index.test
index 4edbfc2bc..7ddc21a45 100755
--- a/testing/drop_index.test
+++ b/testing/drop_index.test
@@ -44,3 +44,15 @@ do_execsql_test_on_specific_db {:memory:} drop-index-after-ops-1 {
     DROP INDEX t_idx6;
     SELECT count(*) FROM sqlite_schema WHERE type='index' AND name='t_idx6';
 } {0}
+
+# Test dropping of indices associated with unique or primary contraint indices produces an error
+do_execsql_test_in_memory_error_content  drop-index-primary-key-index {
+    CREATE TABLE t15a (id TEXT PRIMARY KEY );
+    DROP INDEX sqlite_autoindex_t15a_1;
+} {"index associated with UNIQUE or PRIMARY KEY constraint cannot be dropped"}
+
+
+do_execsql_test_in_memory_error_content drop-index-unique-index {
+    CREATE TABLE t15b (id INT UNIQUE );
+    DROP INDEX sqlite_autoindex_t15b_1;
+} {"index associated with UNIQUE or PRIMARY KEY constraint cannot be dropped"}
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