diff --git a/test/Client/TestAdapterTest.php b/test/Client/TestAdapterTest.php
index cfd4105c..d96abc9d 100644
--- a/test/Client/TestAdapterTest.php
+++ b/test/Client/TestAdapterTest.php
@@ -189,7 +189,7 @@ public function testSettingNextResponseToAnInvalidIndex()
                 $this->fail();
             } catch (\Exception $e) {
                 $this->assertInstanceOf(OutOfRangeException::class, $e);
-                $this->assertRegexp('/out of range/i', $e->getMessage());
+                $this->assertMatchesRegularExpression('/out of range/i', $e->getMessage());
             }
         }
     }
diff --git a/test/Header/LocationTest.php b/test/Header/LocationTest.php
index f6ca8e99..bcc2f8dc 100644
--- a/test/Header/LocationTest.php
+++ b/test/Header/LocationTest.php
@@ -54,7 +54,7 @@ public function testLocationCanSetDifferentSchemeUris($uri, $expectedClass)
     {
         $locationHeader = new Location();
         $locationHeader->setUri($uri);
-        $this->assertInstanceOf($expectedClass, $locationHeader->uri);
+        $this->assertInstanceOf($expectedClass, $locationHeader->uri());
     }
 
     /**
@@ -70,7 +70,7 @@ public function testLocationCanSetDifferentSchemeUriObjects($uri, $expectedClass
         $uri = UriFactory::factory($uri);
         $locationHeader = new Location();
         $locationHeader->setUri($uri);
-        $this->assertInstanceOf($expectedClass, $locationHeader->uri);
+        $this->assertInstanceOf($expectedClass, $locationHeader->uri());
     }
 
     /**
diff --git a/test/Header/SetCookieTest.php b/test/Header/SetCookieTest.php
index 22add77d..cf5c1ca3 100644
--- a/test/Header/SetCookieTest.php
+++ b/test/Header/SetCookieTest.php
@@ -588,7 +588,7 @@ public function testSetJsonValue()
         $cookie = new SetCookie($cookieName, $jsonData);
 
         $regExp = sprintf('#^%s=%s#', $cookieName, urlencode($jsonData));
-        $this->assertRegExp($regExp, $cookie->getFieldValue());
+        $this->assertMatchesRegularExpression($regExp, $cookie->getFieldValue());
 
         $cookieName = 'fooCookie';
         $jsonData = json_encode(['foo' => 'bar']);
@@ -597,7 +597,7 @@ public function testSetJsonValue()
         $cookie->setDomain('example.org');
 
         $regExp = sprintf('#^%s=%s; Domain=#', $cookieName, urlencode($jsonData));
-        $this->assertRegExp($regExp, $cookie->getFieldValue());
+        $this->assertMatchesRegularExpression($regExp, $cookie->getFieldValue());
     }
 
     /**