diff --git a/ChangeLog-6.0.md b/ChangeLog-6.0.md
index 2997bccc6a1..01d3347312f 100644
--- a/ChangeLog-6.0.md
+++ b/ChangeLog-6.0.md
@@ -6,6 +6,7 @@ All notable changes of the PHPUnit 6.0 release series are documented in this fil
 
 ### Fixed
 
+* Fixed [#2460](https://github.com/sebastianbergmann/phpunit/issues/2460): Strange error in tests after update to PHPUnit 6
 * Fixed [#2467](https://github.com/sebastianbergmann/phpunit/issues/2467): Process Isolation does not work when using PHPUnit from PHAR
 
 ## [6.0.2] - 2017-02-03
diff --git a/src/Framework/Constraint/Callback.php b/src/Framework/Constraint/Callback.php
index d587201e6b5..6f71ee56906 100644
--- a/src/Framework/Constraint/Callback.php
+++ b/src/Framework/Constraint/Callback.php
@@ -9,7 +9,6 @@
  */
 namespace PHPUnit\Framework\Constraint;
 
-use PHPUnit\Framework\Exception;
 use PHPUnit\Util\InvalidArgumentHelper;
 
 /**
@@ -22,7 +21,7 @@ class Callback extends Constraint
     /**
      * @param callable $callback
      *
-     * @throws Exception
+     * @throws \PHPUnit\Framework\Exception
      */
     public function __construct($callback)
     {
diff --git a/src/Framework/Constraint/ExceptionMessageRegularExpression.php b/src/Framework/Constraint/ExceptionMessageRegularExpression.php
index 100936af7ab..f36b1bd6aea 100644
--- a/src/Framework/Constraint/ExceptionMessageRegularExpression.php
+++ b/src/Framework/Constraint/ExceptionMessageRegularExpression.php
@@ -9,7 +9,6 @@
  */
 namespace PHPUnit\Framework\Constraint;
 
-use PHPUnit\Framework\Exception;
 use PHPUnit\Util\RegularExpression;
 
 /**
@@ -34,7 +33,7 @@ public function __construct($expected)
      * Evaluates the constraint for parameter $other. Returns true if the
      * constraint is met, false otherwise.
      *
-     * @param Exception $other
+     * @param \PHPUnit\Framework\Exception $other
      *
      * @return bool
      */
@@ -43,7 +42,7 @@ protected function matches($other)
         $match = RegularExpression::safeMatch($this->expectedMessageRegExp, $other->getMessage());
 
         if (false === $match) {
-            throw new Exception(
+            throw new \PHPUnit\Framework\Exception(
                 "Invalid expected exception message regex given: '{$this->expectedMessageRegExp}'"
             );
         }
diff --git a/src/Framework/Constraint/IsEqual.php b/src/Framework/Constraint/IsEqual.php
index 101cd4b1351..b1559f4f9c0 100644
--- a/src/Framework/Constraint/IsEqual.php
+++ b/src/Framework/Constraint/IsEqual.php
@@ -9,7 +9,6 @@
  */
 namespace PHPUnit\Framework\Constraint;
 
-use PHPUnit\Framework\Exception;
 use PHPUnit\Framework\ExpectationFailedException;
 use PHPUnit\Util\InvalidArgumentHelper;
 use SebastianBergmann;
@@ -62,7 +61,7 @@ class IsEqual extends Constraint
      * @param bool  $canonicalize
      * @param bool  $ignoreCase
      *
-     * @throws Exception
+     * @throws \PHPUnit\Framework\Exception
      */
     public function __construct($value, $delta = 0.0, $maxDepth = 10, $canonicalize = false, $ignoreCase = false)
     {
diff --git a/src/Framework/Constraint/IsType.php b/src/Framework/Constraint/IsType.php
index 4ca94d3c46a..02702e94a19 100644
--- a/src/Framework/Constraint/IsType.php
+++ b/src/Framework/Constraint/IsType.php
@@ -9,8 +9,6 @@
  */
 namespace PHPUnit\Framework\Constraint;
 
-use PHPUnit\Framework\Exception;
-
 /**
  * Constraint that asserts that the value it is evaluated for is of a
  * specified type.
@@ -60,14 +58,14 @@ class IsType extends Constraint
     /**
      * @param string $type
      *
-     * @throws Exception
+     * @throws \PHPUnit\Framework\Exception
      */
     public function __construct($type)
     {
         parent::__construct();
 
         if (!isset($this->types[$type])) {
-            throw new Exception(
+            throw new \PHPUnit\Framework\Exception(
                 sprintf(
                     'Type specified for PHPUnit\Framework\Constraint\IsType <%s> ' .
                     'is not a valid type.',
diff --git a/src/Framework/Constraint/LogicalAnd.php b/src/Framework/Constraint/LogicalAnd.php
index 13e81928456..fdf836f9b57 100644
--- a/src/Framework/Constraint/LogicalAnd.php
+++ b/src/Framework/Constraint/LogicalAnd.php
@@ -9,7 +9,6 @@
  */
 namespace PHPUnit\Framework\Constraint;
 
-use PHPUnit\Framework\Exception;
 use PHPUnit\Framework\ExpectationFailedException;
 
 /**
@@ -30,7 +29,7 @@ class LogicalAnd extends Constraint
     /**
      * @param Constraint[] $constraints
      *
-     * @throws Exception
+     * @throws \PHPUnit\Framework\Exception
      */
     public function setConstraints(array $constraints)
     {
@@ -38,7 +37,7 @@ public function setConstraints(array $constraints)
 
         foreach ($constraints as $constraint) {
             if (!($constraint instanceof Constraint)) {
-                throw new Exception(
+                throw new \PHPUnit\Framework\Exception(
                     'All parameters to ' . __CLASS__ .
                     ' must be a constraint object.'
                 );
diff --git a/src/Framework/Constraint/TraversableContains.php b/src/Framework/Constraint/TraversableContains.php
index e41526b66de..71765c227ee 100644
--- a/src/Framework/Constraint/TraversableContains.php
+++ b/src/Framework/Constraint/TraversableContains.php
@@ -9,7 +9,6 @@
  */
 namespace PHPUnit\Framework\Constraint;
 
-use PHPUnit\Framework\Exception;
 use PHPUnit\Util\InvalidArgumentHelper;
 use SplObjectStorage;
 
@@ -39,7 +38,7 @@ class TraversableContains extends Constraint
      * @param bool  $checkForObjectIdentity
      * @param bool  $checkForNonObjectIdentity
      *
-     * @throws Exception
+     * @throws \PHPUnit\Framework\Exception
      */
     public function __construct($value, $checkForObjectIdentity = true, $checkForNonObjectIdentity = false)
     {