diff --git a/tests/TimeSpanTest.php b/tests/TimeSpanTest.php
index e40630c..e105c63 100644
--- a/tests/TimeSpanTest.php
+++ b/tests/TimeSpanTest.php
@@ -567,7 +567,7 @@ public function testAdd(int $firstDays, int $secondDays, int $sumDays): void
 
     public function testAddOverflow(): void
     {
-        self::expectException(\OutOfBoundsException::class);
+        $this->expectException(\OutOfBoundsException::class);
 
         $tooManyDays = 99_999;
         $firstSpan = TimeSpan::fromDays($tooManyDays);
@@ -592,7 +592,7 @@ public function testSub(int $firstDays, int $secondDays, int $diffDays): void
 
     public function testSubOverflow(): void
     {
-        self::expectException(\OutOfBoundsException::class);
+        $this->expectException(\OutOfBoundsException::class);
 
         $tooManyDays = 99_999;
         $zeroSpan = TimeSpan::fromDays(0);
@@ -617,7 +617,7 @@ public function testMul(int $days, int|float $times, int $daysProduct): void
 
     public function testMulOverflow(): void
     {
-        self::expectException(\OutOfBoundsException::class);
+        $this->expectException(\OutOfBoundsException::class);
 
         $tooManyDays = 99_999;
         $span = TimeSpan::fromDays($tooManyDays);
@@ -640,7 +640,7 @@ public function testDiv(int $nanoseconds, int|float $factor, int $nanosecondsQuo
 
     public function testDivOverflow(): void
     {
-        self::expectException(\OutOfBoundsException::class);
+        $this->expectException(\OutOfBoundsException::class);
 
         $tooManyDays = 99_999;
         $span = TimeSpan::fromDays($tooManyDays);
@@ -650,7 +650,7 @@ public function testDivOverflow(): void
 
     public function testDivByZero(): void
     {
-        self::expectException(\DivisionByZeroError::class);
+        $this->expectException(\DivisionByZeroError::class);
 
         $span = TimeSpan::fromDays(5);
         $span->div(0);