diff --git a/src/Persistence/Sql/Sqlite/Query.php b/src/Persistence/Sql/Sqlite/Query.php
index b6c969750..b6887867c 100644
--- a/src/Persistence/Sql/Sqlite/Query.php
+++ b/src/Persistence/Sql/Sqlite/Query.php
@@ -137,6 +137,27 @@ function ($sqlLeft, $sqlRight) {
         );
     }
 
+    #[\Override]
+    protected function _renderConditionRegexpOperator(bool $negated, string $sqlLeft, string $sqlRight, ?bool $caseSensitive = null): string
+    {
+        if ($caseSensitive !== null) {
+            return parent::_renderConditionRegexpOperator($negated, $sqlLeft, $sqlRight, $caseSensitive);
+        }
+
+        return ($negated ? 'not ' : '') . $this->_renderConditionBinaryReuse(
+            $sqlLeft,
+            $sqlRight,
+            function ($sqlLeft, $sqlRight) {
+                $res = 'case when ' . $sqlLeft . ' = lower(' . $sqlLeft . ') and ' . $sqlLeft . ' = upper(' . $sqlLeft . ')'
+                    . ' then ' . parent::_renderConditionRegexpOperator(false, $sqlLeft, $sqlRight)
+                    . ' else ' . parent::_renderConditionRegexpOperator(false, $sqlLeft, $sqlRight, true)
+                    . ' end';
+
+                return $res;
+            }
+        );
+    }
+
     #[\Override]
     public function groupConcat($field, string $separator = ',')
     {
diff --git a/tests/ConditionSqlTest.php b/tests/ConditionSqlTest.php
index 659e2eedc..c5166c8ca 100644
--- a/tests/ConditionSqlTest.php
+++ b/tests/ConditionSqlTest.php
@@ -689,10 +689,11 @@ public function testRegexpCondition(string $type, bool $isBinary): void
             return $res;
         };
 
+        // TODO SQLSTATE[HY000]: General error: 3995 Character set 'binary' cannot be used in conjunction with 'utf8mb4_general_ci' in call to regexp_like.
         if ($this->getDatabasePlatform() instanceof MySQLPlatform && $type === 'binary' && $this->getConnection()->getConnection()->getNativeConnection() instanceof \PDO) {
             self::assertTrue(true); // @phpstan-ignore-line
 
-            return; // TODO SQLSTATE[HY000]: General error: 3995 Character set 'binary' cannot be used in conjunction with 'utf8mb4_general_ci' in call to regexp_like.
+            return;
         }
 
         if ($this->getDatabasePlatform() instanceof MySQLPlatform && ($type === 'binary' || $type === 'blob')) {
@@ -719,9 +720,9 @@ public function testRegexpCondition(string $type, bool $isBinary): void
         }
 
         self::assertSame([1], $findIdsRegexFx('name', 'John'));
-        self::assertSame(/* $isBinary ? [] : */ [1], $findIdsRegexFx('name', 'john'));
+        self::assertSame($isBinary ? [] : [1], $findIdsRegexFx('name', 'john'));
         self::assertSame([13], $findIdsRegexFx('name', 'heiß'));
-        self::assertSame(/* $isBinary ? [] : */ [13], $findIdsRegexFx('name', 'Heiß'));
+        self::assertSame($isBinary ? [] : [13], $findIdsRegexFx('name', 'Heiß'));
         self::assertSame([1], $findIdsRegexFx('name', 'Joh'));
         self::assertSame([1], $findIdsRegexFx('name', 'ohn'));
         self::assertSame([1, 2, 3, ...($this->getDatabasePlatform() instanceof OraclePlatform ? [] : [4]), 13], $findIdsRegexFx('name', 'a', true));
@@ -758,7 +759,7 @@ public function testRegexpCondition(string $type, bool $isBinary): void
         self::assertSame([5, 6, 7, 8, 9, 11, 12], $findIdsRegexFx('name', 'Sa.ra'));
         self::assertSame([2, 3, 13], $findIdsRegexFx('name', '[e]'));
         self::assertSame([1, 2, 3, 13], $findIdsRegexFx('name', '[eo]'));
-        self::assertSame([1, 2, 3, .../* ($isBinary ? [] : */ [13] /* ) */], $findIdsRegexFx('name', '[A-P][aeo]'));
+        self::assertSame([1, 2, 3, ...($isBinary ? [] : [13])], $findIdsRegexFx('name', '[A-P][aeo]'));
         self::assertSame([3], $findIdsRegexFx('name', 'o[^h]'));
         self::assertSame([5, 6, 7, 8, 9, 10, 11, 12], $findIdsRegexFx('name', '^Sa'));
         self::assertSame([], $findIdsRegexFx('name', '^ra'));
diff --git a/tests/Persistence/Sql/QueryTest.php b/tests/Persistence/Sql/QueryTest.php
index 62c5b60e0..589b21ce6 100644
--- a/tests/Persistence/Sql/QueryTest.php
+++ b/tests/Persistence/Sql/QueryTest.php
@@ -842,11 +842,13 @@ public function testWhereSpecialValues(): void
             $this->q('[where]')->where('name', 'not regexp', '^foo')->render()[0]
         );
         self::assertSame(
-            'where regexp_like(`name`, :a, \'is\')',
+            'where case when `name` = lower(`name`) and `name` = upper(`name`) then regexp_like(`name`, :a, \'is\') else regexp_like(`name`, :a, \'s\') end',
             (new SqliteQuery('[where]'))->where('name', 'regexp', 'foo')->render()[0]
         );
         self::assertSame(
-            'where regexp_like(`name`, sum("b"), \'is\')',
+            version_compare(SqliteConnection::getDriverVersion(), '3.45') < 0
+                ? 'where case when `name` = lower(`name`) and `name` = upper(`name`) then regexp_like(`name`, sum("b"), \'is\') else regexp_like(`name`, sum("b"), \'s\') end'
+                : 'where (select case when `name` = lower(`name`) and `name` = upper(`name`) then regexp_like(`name`, `__atk4_reuse_right__`, \'is\') else regexp_like(`name`, `__atk4_reuse_right__`, \'s\') end from (select sum("b") `__atk4_reuse_right__`) `__atk4_reuse_tmp__`)',
             (new SqliteQuery('[where]'))->where('name', 'regexp', $this->e('sum({})', ['b']))->render()[0]
         );
         // TODO add MysqlQuery test once MySQL 5.x support is dropped
diff --git a/tests/Schema/MigratorTest.php b/tests/Schema/MigratorTest.php
index d24479af1..0ee2c9b36 100644
--- a/tests/Schema/MigratorTest.php
+++ b/tests/Schema/MigratorTest.php
@@ -11,6 +11,7 @@
 use Atk4\Data\Schema\TestCase;
 use Doctrine\DBAL\Exception\TableExistsException;
 use Doctrine\DBAL\Exception\TableNotFoundException;
+use Doctrine\DBAL\Platforms\MySQLPlatform;
 use Doctrine\DBAL\Platforms\OraclePlatform;
 use Doctrine\DBAL\Platforms\PostgreSQLPlatform;
 use Doctrine\DBAL\Platforms\SQLServerPlatform;
@@ -128,10 +129,14 @@ public function testCharacterTypeFieldCaseSensitivity(string $type, bool $isBina
                 $model->addCondition('v', 'like', '%ix%Case');
                 self::assertSameExportUnordered($expectedExport, $model->export(['id']));
 
-                // TODO
-                // $model->scope()->clear();
-                // $model->addCondition('v', 'regexp', 'ix.+Case');
-                // self::assertSameExportUnordered($expectedExport, $model->export(['id']));
+                // TODO SQLSTATE[HY000]: General error: 3995 Character set 'binary' cannot be used in conjunction with 'utf8mb4_general_ci' in call to regexp_like.
+                if ($this->getDatabasePlatform() instanceof MySQLPlatform && $type === 'binary' && $this->getConnection()->getConnection()->getNativeConnection() instanceof \PDO) {
+                    return;
+                }
+
+                $model->scope()->clear();
+                $model->addCondition('v', 'regexp', 'ix.+Case');
+                self::assertSameExportUnordered($expectedExport, $model->export(['id']));
             }
         }
     }