diff --git a/src/Dibi/Drivers/FirebirdDriver.php b/src/Dibi/Drivers/FirebirdDriver.php
index 1802fbbe..e1f8c69f 100644
--- a/src/Dibi/Drivers/FirebirdDriver.php
+++ b/src/Dibi/Drivers/FirebirdDriver.php
@@ -94,7 +94,7 @@ public function query(string $sql): ?Dibi\ResultDriver
 		$res = ibase_query($resource, $sql);
 
 		if ($res === false) {
-			if (ibase_errcode() == self::ERROR_EXCEPTION_THROWN) {
+			if (ibase_errcode() === self::ERROR_EXCEPTION_THROWN) {
 				preg_match('/exception (\d+) (\w+) (.*)/i', ibase_errmsg(), $match);
 				throw new Dibi\ProcedureException($match[3], $match[1], $match[2], $sql);
 
diff --git a/src/Dibi/Drivers/FirebirdResult.php b/src/Dibi/Drivers/FirebirdResult.php
index f37c18d4..be998208 100644
--- a/src/Dibi/Drivers/FirebirdResult.php
+++ b/src/Dibi/Drivers/FirebirdResult.php
@@ -67,7 +67,7 @@ public function fetch(bool $assoc): ?array
 			: @ibase_fetch_row($this->resultSet, IBASE_TEXT); // intentionally @
 
 		if (ibase_errcode()) {
-			if (ibase_errcode() == FirebirdDriver::ERROR_EXCEPTION_THROWN) {
+			if (ibase_errcode() === FirebirdDriver::ERROR_EXCEPTION_THROWN) {
 				preg_match('/exception (\d+) (\w+) (.*)/is', ibase_errmsg(), $match);
 				throw new Dibi\ProcedureException($match[3], $match[1], $match[2]);
 
diff --git a/src/Dibi/Drivers/SqliteReflector.php b/src/Dibi/Drivers/SqliteReflector.php
index 1933a02b..d402b86f 100644
--- a/src/Dibi/Drivers/SqliteReflector.php
+++ b/src/Dibi/Drivers/SqliteReflector.php
@@ -64,7 +64,7 @@ public function getColumns(string $table): array
 				'fullname' => "$table.$column",
 				'nativetype' => strtoupper($type[0]),
 				'size' => isset($type[1]) ? (int) $type[1] : null,
-				'nullable' => $row['notnull'] == '0',
+				'nullable' => $row['notnull'] === '0',
 				'default' => $row['dflt_value'],
 				'autoincrement' => $row['pk'] && $type[0] === 'INTEGER',
 				'vendor' => $row,
@@ -98,7 +98,7 @@ public function getIndexes(string $table): array
 			$column = $indexes[$index]['columns'][0];
 			$primary = false;
 			foreach ($columns as $info) {
-				if ($column == $info['name']) {
+				if ($column === $info['name']) {
 					$primary = $info['vendor']['pk'];
 					break;
 				}
@@ -138,7 +138,7 @@ public function getForeignKeys(string $table): array
 			$keys[$row['id']]['onDelete'] = $row['on_delete'];
 			$keys[$row['id']]['onUpdate'] = $row['on_update'];
 
-			if ($keys[$row['id']]['foreign'][0] == null) {
+			if ($keys[$row['id']]['foreign'][0] === null) {
 				$keys[$row['id']]['foreign'] = null;
 			}
 		}
diff --git a/src/Dibi/Translator.php b/src/Dibi/Translator.php
index 32f7a0d0..1a7852e0 100644
--- a/src/Dibi/Translator.php
+++ b/src/Dibi/Translator.php
@@ -627,7 +627,7 @@ private function cb(array $matches): string
 		if ($matches[8]) { // SQL identifier substitution
 			$m = substr($matches[8], 0, -1);
 			$m = $this->connection->getSubstitutes()->$m;
-			return $matches[9] == ''
+			return $matches[9] === ''
 				? $this->formatValue($m, null)
 				: $m . $matches[9]; // value or identifier
 		}