diff --git a/src/Database/Concerns/ValidatesDatabaseParameters.php b/src/Database/Concerns/ValidatesDatabaseParameters.php
index 0b1ce746..18af74c7 100644
--- a/src/Database/Concerns/ValidatesDatabaseParameters.php
+++ b/src/Database/Concerns/ValidatesDatabaseParameters.php
@@ -23,7 +23,7 @@ trait ValidatesDatabaseParameters
      * Used as the default allowlist in validateParameter(), which validates non-password
      * parameters such as database names or usernames.
      */
-    protected static function allowedParameterCharacters(): string
+    protected function allowedParameterCharacters(): string
     {
         return 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-';
     }
@@ -36,7 +36,7 @@ trait ValidatesDatabaseParameters
      * characters that can break out of the quoted SQL strings (so e.g.
      * ', ", \, and ` aren't allowed).
      */
-    protected static function allowedPasswordCharacters(): string
+    protected function allowedPasswordCharacters(): string
     {
         return ' !#$%&()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^_abcdefghijklmnopqrstuvwxyz{|}~';
     }
@@ -46,15 +46,15 @@ trait ValidatesDatabaseParameters
      * only contain allowed characters before used in SQL statements
      * (or paths in the case of SQLiteDatabaseManager).
      *
-     * By default, only the characters in static::allowedParameterCharacters() are allowed.
+     * By default, only the characters in allowedParameterCharacters() are allowed.
      *
      * Null parameters are skipped.
      *
      * @throws InvalidArgumentException
      */
-    protected static function validateParameter(string|array|null $parameters, string|null $allowedCharacters = null): void
+    protected function validateParameter(string|array|null $parameters, string|null $allowedCharacters = null): void
     {
-        $allowedCharacters ??= static::allowedParameterCharacters();
+        $allowedCharacters ??= $this->allowedParameterCharacters();
 
         foreach ((array) $parameters as $parameter) {
             if (is_null($parameter)) {
@@ -78,7 +78,7 @@ trait ValidatesDatabaseParameters
     }
 
     /**
-     * Ensure password only contains allowed characters (static::allowedPasswordCharacters())
+     * Ensure password only contains allowed characters (allowedPasswordCharacters())
      * before used in SQL statements.
      *
      * Used in permission controlled managers as a shorthand for calling validateParameter()
@@ -86,8 +86,8 @@ trait ValidatesDatabaseParameters
      *
      * @throws InvalidArgumentException
      */
-    protected static function validatePassword(string|null $password): void
+    protected function validatePassword(string|null $password): void
     {
-        static::validateParameter($password, allowedCharacters: static::allowedPasswordCharacters());
+        $this->validateParameter($password, allowedCharacters: $this->allowedPasswordCharacters());
     }
 }
diff --git a/src/Database/TenantDatabaseManagers/SQLiteDatabaseManager.php b/src/Database/TenantDatabaseManagers/SQLiteDatabaseManager.php
index 8f52a9ed..129cdb37 100644
--- a/src/Database/TenantDatabaseManagers/SQLiteDatabaseManager.php
+++ b/src/Database/TenantDatabaseManagers/SQLiteDatabaseManager.php
@@ -136,6 +136,9 @@ class SQLiteDatabaseManager implements TenantDatabaseManager
     public function makeConnectionConfig(array $baseConfig, string $databaseName): array
     {
         if ($this->isInMemory($databaseName)) {
+            // Named in-memory DBs are formatted like 'file:_tenancy_inmemory_tenant123?mode=memory&cache=shared'
+            $this->validateDatabaseName($databaseName, ':?=&');
+
             $baseConfig['database'] = $databaseName;
 
             if (static::$persistInMemoryConnectionUsing !== null) {
@@ -162,30 +165,21 @@ class SQLiteDatabaseManager implements TenantDatabaseManager
 
     public static function isInMemory(string $name): bool
     {
-        if ($name === ':memory:') {
-            return true;
-        }
+        $isNamed = str_starts_with($name, 'file:_tenancy_inmemory_') &&
+            str_ends_with($name, '?mode=memory&cache=shared');
 
-        if (str_starts_with($name, 'file:_tenancy_inmemory_') &&
-            str_ends_with($name, '?mode=memory&cache=shared')) {
-            // Named in-memory DBs are formatted like 'file:_tenancy_inmemory_tenant123?mode=memory&cache=shared'
-            static::validateDatabaseName($name, ':?=&');
-
-            return true;
-        }
-
-        return false;
+        return $name === ':memory:' || $isNamed;
     }
 
     /**
      * Ensure database name only contains allowed characters
-     * (static::allowedDatabaseNameCharacters() + $extraAllowedCharacters) and is not a directory name.
+     * (allowedDatabaseNameCharacters() + $extraAllowedCharacters) and is not a directory name.
      *
      * @throws InvalidArgumentException
      */
-    protected static function validateDatabaseName(string $name, string $extraAllowedCharacters = ''): void
+    protected function validateDatabaseName(string $name, string $extraAllowedCharacters = ''): void
     {
-        static::validateParameter($name, static::allowedDatabaseNameCharacters() . $extraAllowedCharacters);
+        $this->validateParameter($name, $this->allowedDatabaseNameCharacters() . $extraAllowedCharacters);
 
         if ($name === '') {
             throw new InvalidArgumentException('Database name cannot be empty.');