diff --git a/lib/Db/PDOError.php b/lib/Db/PDOError.php
index 25b2a08f..dcb8aa45 100644
--- a/lib/Db/PDOError.php
+++ b/lib/Db/PDOError.php
@@ -37,7 +37,7 @@ trait PDOError {
                             case SQLite3::SQLITE_MISMATCH:
                                 return [ExceptionInput::class, 'engineTypeViolation', $err[2]];
                         }
-                        break;
+                        break; // @codeCoverageIgnore
                     case "mysql":
                         switch ($err[1]) {
                             case 1205:
@@ -47,7 +47,7 @@ trait PDOError {
                             case 1366:
                                 return [ExceptionInput::class, 'engineTypeViolation', $err[2]];
                         }
-                        break;
+                        break; // @codeCoverageIgnore
                 }
                 return [Exception::class, "engineErrorGeneral", $err[0]."/".$err[1].": ".$err[2]]; // @codeCoverageIgnore
             default:
diff --git a/lib/Db/PDOStatement.php b/lib/Db/PDOStatement.php
index 2115ce5c..d5a36c5f 100644
--- a/lib/Db/PDOStatement.php
+++ b/lib/Db/PDOStatement.php
@@ -30,11 +30,12 @@ class PDOStatement extends AbstractStatement {
 
     protected function prepare(string $query): bool {
         try {
+            // PDO statements aren't usually evaluated at creation, and so should not fail
             $this->st = $this->db->prepare($query);
             return true;
-        } catch (\PDOException $e) {
-            list($excClass, $excMsg, $excData) = $this->exceptionBuild();
-            throw new $excClass($excMsg, $excData);
+        } catch (\PDOException $e) { // @codeCoverageIgnore
+            list($excClass, $excMsg, $excData) = $this->exceptionBuild(); // @codeCoverageIgnore
+            throw new $excClass($excMsg, $excData); // @codeCoverageIgnore
         }
     }
 
diff --git a/lib/Db/SQLite3/Statement.php b/lib/Db/SQLite3/Statement.php
index 2de3e3bd..8c393ca6 100644
--- a/lib/Db/SQLite3/Statement.php
+++ b/lib/Db/SQLite3/Statement.php
@@ -37,11 +37,12 @@ class Statement extends \JKingWeb\Arsse\Db\AbstractStatement {
 
     protected function prepare(string $query): bool {
         try {
+            // statements aren't evaluated at creation, and so should not fail
             $this->st = $this->db->prepare($query);
             return true;
-        } catch (\Exception $e) {
-            list($excClass, $excMsg, $excData) = $this->exceptionBuild();
-            throw new $excClass($excMsg, $excData);
+        } catch (\Exception $e) { // @codeCoverageIgnore
+            list($excClass, $excMsg, $excData) = $this->exceptionBuild(); // @codeCoverageIgnore
+            throw new $excClass($excMsg, $excData); // @codeCoverageIgnore
         }
     }
 
diff --git a/tests/cases/Db/BaseDriver.php b/tests/cases/Db/BaseDriver.php
index 91992e45..08f96349 100644
--- a/tests/cases/Db/BaseDriver.php
+++ b/tests/cases/Db/BaseDriver.php
@@ -95,6 +95,7 @@ abstract class BaseDriver extends \JKingWeb\Arsse\Test\AbstractTest {
 
     public function testTranslateAToken() {
         $this->assertRegExp("/^[a-z][a-z0-9]*$/i", $this->drv->sqlToken("greatest"));
+        $this->assertRegExp("/^\"?[a-z][a-z0-9_\-]*\"?$/i", $this->drv->sqlToken("nocase"));
         $this->assertSame("distinct", $this->drv->sqlToken("distinct"));
     }
 
diff --git a/tests/cases/Db/MySQLPDO/TestStatement.php b/tests/cases/Db/MySQLPDO/TestStatement.php
index a0727ea8..f956302c 100644
--- a/tests/cases/Db/MySQLPDO/TestStatement.php
+++ b/tests/cases/Db/MySQLPDO/TestStatement.php
@@ -8,7 +8,7 @@ namespace JKingWeb\Arsse\TestCase\Db\MySQLPDO;
 
 /**
  * @group slow
- * @covers \JKingWeb\Arsse\Db\PDOStatement<extended>
+ * @covers \JKingWeb\Arsse\Db\MySQL\PDOStatement<extended>
  * @covers \JKingWeb\Arsse\Db\PDOError */
 class TestStatement extends \JKingWeb\Arsse\TestCase\Db\BaseStatement {
     protected static $implementation = "PDO MySQL";