diff --git a/tests/default/DbaInferenceTest.php b/tests/default/DbaInferenceTest.php
index 70fdab376..456121672 100644
--- a/tests/default/DbaInferenceTest.php
+++ b/tests/default/DbaInferenceTest.php
@@ -50,7 +50,7 @@ public function dataFileAsserts(): iterable
         yield from $this->gatherAssertTypes(__DIR__.'/data/runMysqlQuery.php');
 
         // XXX cases which are not yet supported by the PdoQueryReflector
-        if ('pdo' !== getenv('DBA_REFLECTOR')) {
+        if ('pdo' !== getenv('DBA_REFLECTOR') && 'pdo-pgsql' !== getenv('DBA_REFLECTOR')) {
             yield from $this->gatherAssertTypes(__DIR__.'/data/query-alias.php');
         }
 
diff --git a/tests/default/data/pdo-mysql.php b/tests/default/data/pdo-mysql.php
index 507f58282..67fb73bc1 100644
--- a/tests/default/data/pdo-mysql.php
+++ b/tests/default/data/pdo-mysql.php
@@ -28,7 +28,7 @@ public function aggregateFunctions(PDO $pdo)
         assertType('PDOStatement<array{MAX(adaid): int<-32768, 32767>|null, MIN(adaid): int<-32768, 32767>|null, COUNT(adaid): int, AVG(adaid): float|null}>', $stmt);
     }
 
-    public function placeholderInData(PDO $pdo)
+    public function placeholderInDataPrepared(PDO $pdo)
     {
         // double quotes within the query
         $query = 'SELECT adaid FROM ada WHERE email LIKE ":gesperrt%"';
@@ -44,4 +44,12 @@ public function placeholderInData(PDO $pdo)
         $stmt->execute();
         assertType('PDOStatement<array{adaid: int<-32768, 32767>, 0: int<-32768, 32767>}>', $stmt);
     }
+
+    public function placeholderInDataQuery(PDO $pdo)
+    {
+        // double quotes within the query
+        $query = 'SELECT adaid FROM ada WHERE email LIKE ":gesperrt%"';
+        $stmt = $pdo->query($query, PDO::FETCH_ASSOC);
+        assertType('PDOStatement<array{adaid: int<-32768, 32767>}>', $stmt);
+    }
 }
diff --git a/tests/default/data/pdo.php b/tests/default/data/pdo.php
index cb3807584..f55e1df56 100644
--- a/tests/default/data/pdo.php
+++ b/tests/default/data/pdo.php
@@ -153,10 +153,6 @@ public function placeholderInData(PDO $pdo)
         $stmt = $pdo->query($query, PDO::FETCH_ASSOC);
         assertType('PDOStatement<array{adaid: int<-32768, 32767>}>', $stmt);
 
-        $query = 'SELECT adaid FROM ada WHERE email LIKE ":gesperrt%"';
-        $stmt = $pdo->query($query, PDO::FETCH_ASSOC);
-        assertType('PDOStatement<array{adaid: int<-32768, 32767>}>', $stmt);
-
         $query = "SELECT adaid FROM ada WHERE email LIKE ':gesperrt%'";
         $stmt = $pdo->query($query, PDO::FETCH_ASSOC);
         assertType('PDOStatement<array{adaid: int<-32768, 32767>}>', $stmt);
diff --git a/tests/default/data/query-alias.php b/tests/default/data/query-alias.php
index 2d7fed1a0..2ddfa5482 100644
--- a/tests/default/data/query-alias.php
+++ b/tests/default/data/query-alias.php
@@ -7,6 +7,7 @@
 
 class Foo
 {
+    // TODO pgsql: doesn't resolve null?
     public function leftJoinQuery(PDO $pdo)
     {
         $query = 'SELECT a.email, b.adaid FROM ada a LEFT JOIN ada b ON a.adaid=b.adaid';