diff --git a/src/Constraint/MultiConstraint.php b/src/Constraint/MultiConstraint.php
index 31e2c45c..39d643f7 100644
--- a/src/Constraint/MultiConstraint.php
+++ b/src/Constraint/MultiConstraint.php
@@ -237,8 +237,6 @@ private static function optimizeConstraints(array $constraints, $conjunctive)
                     && $left->conjunctive
                     && $right instanceof self
                     && $right->conjunctive
-                    && \count($left->constraints) === 2
-                    && \count($right->constraints) === 2
                     && ($left0 = (string) $left->constraints[0])
                     && $left0[0] === '>' && $left0[1] === '='
                     && ($left1 = (string) $left->constraints[1])
@@ -249,6 +247,29 @@ private static function optimizeConstraints(array $constraints, $conjunctive)
                     && $right1[0] === '<'
                     && substr($left1, 2) === substr($right0, 3)
                 ) {
+                    for ($j = 2, $m = count($right->constraints); $j < $m; $j++) {
+                        $c = (string)$right->constraints[$j];
+                        switch ($c[0]) {
+                            case '!':
+                            case '<':
+                            case '=':
+                                break;
+                            default:
+                                continue 3;
+                        }
+                    }
+                    for ($j = 2, $m = count($left->constraints); $j < $m; $j++) {
+                        $c = (string)$left->constraints[$j];
+                        switch ($c[0]) {
+                            case '!':
+                            case '>':
+                            case '=':
+                                break;
+                            default:
+                                continue 3;
+                        }
+                    }
+
                     $optimized = true;
                     $left = new MultiConstraint(
                         array_merge(
@@ -260,10 +281,11 @@ private static function optimizeConstraints(array $constraints, $conjunctive)
                             \array_slice($right->constraints, 2)
                         ),
                         true);
-                } else {
-                    $mergedConstraints[] = $left;
-                    $left = $right;
+                    continue;
                 }
+
+                $mergedConstraints[] = $left;
+                $left = $right;
             }
             if ($optimized) {
                 $mergedConstraints[] = $left;
diff --git a/tests/Constraint/MultiConstraintTest.php b/tests/Constraint/MultiConstraintTest.php
index fcc83ed9..2d559633 100644
--- a/tests/Constraint/MultiConstraintTest.php
+++ b/tests/Constraint/MultiConstraintTest.php
@@ -312,7 +312,7 @@ public function multiConstraintOptimizations()
                     true // conjunctive
                 ),
             ),
-            'Test does not collapse when one side is more complex' => array(
+            'Test does not collapse when one side changes the bounds' => array(
                 '~2.5.9 || ~2.6, >=2.6.2',
                 new MultiConstraint(
                     array(
@@ -335,96 +335,39 @@ public function multiConstraintOptimizations()
                     false
                 )
             ),
-            'Test does not collapse multiple contiguous with other constraint but collapses the end' => array(
+            'Test collapses multiple contiguous with other constraint' => array(
                 '^1.0 || ^2.0 !=2.0.1 || ^3.0 || ^4.0',
                 new MultiConstraint(
                     array(
-                        new MultiConstraint(
-                            array(
-                                new Constraint('>=', '1.0.0.0-dev'),
-                                new Constraint('<', '2.0.0.0-dev'),
-                            ),
-                            true // conjunctive
-                        ),
-                        new MultiConstraint(
-                            array(
-                                new Constraint('>=', '2.0.0.0-dev'),
-                                new Constraint('<', '3.0.0.0-dev'),
-                                new Constraint('!=', '2.0.1.0'),
-                            ),
-                            true // conjunctive
-                        ),
-                        new MultiConstraint(
-                            array(
-                                new Constraint('>=', '3.0.0.0-dev'),
-                                new Constraint('<', '5.0.0.0-dev'),
-                            ),
-                            true // conjunctive
-                        ),
+                        new Constraint('>=', '1.0.0.0-dev'),
+                        new Constraint('<', '5.0.0.0-dev'),
+                        new Constraint('!=', '2.0.1.0'),
                     ),
-                    false
+                    true
                 )
             ),
-            'Test does not collapse multiple contiguous with multiple other constraint' => array(
+            'Test collapses multiple contiguous with multiple other constraint' => array(
                 '^1.0 != 1.0.1 || ^2.0 !=2.0.1 || ^3.0 || ^4.0 != 4.0.1',
                 new MultiConstraint(
                     array(
-                        new MultiConstraint(
-                            array(
-                                new Constraint('>=', '1.0.0.0-dev'),
-                                new Constraint('<', '2.0.0.0-dev'),
-                                new Constraint('!=', '1.0.1.0'),
-                            ),
-                            true // conjunctive
-                        ),
-                        new MultiConstraint(
-                            array(
-                                new Constraint('>=', '2.0.0.0-dev'),
-                                new Constraint('<', '3.0.0.0-dev'),
-                                new Constraint('!=', '2.0.1.0'),
-                            ),
-                            true // conjunctive
-                        ),
-                        new MultiConstraint(
-                            array(
-                                new Constraint('>=', '3.0.0.0-dev'),
-                                new Constraint('<', '4.0.0.0-dev'),
-                            ),
-                            true // conjunctive
-                        ),
-                        new MultiConstraint(
-                            array(
-                                new Constraint('>=', '4.0.0.0-dev'),
-                                new Constraint('<', '5.0.0.0-dev'),
-                                new Constraint('!=', '4.0.1.0'),
-                            ),
-                            true // conjunctive
-                        ),
+                        new Constraint('>=', '1.0.0.0-dev'),
+                        new Constraint('<', '5.0.0.0-dev'),
+                        new Constraint('!=', '1.0.1.0'),
+                        new Constraint('!=', '2.0.1.0'),
+                        new Constraint('!=', '4.0.1.0'),
                     ),
-                    false
+                    true
                 )
             ),
-            'Test does not collapse if contiguous range and other constraints also apply' => array(
+            'Test collapse if contiguous range and other constraints also apply' => array(
                 '~0.1 || ~1.0 !=1.0.1',
                 new MultiConstraint(
                     array(
-                        new MultiConstraint(
-                            array(
-                                new Constraint('>=', '0.1.0.0-dev'),
-                                new Constraint('<', '1.0.0.0-dev'),
-                            ),
-                            true // conjunctive
-                        ),
-                        new MultiConstraint(
-                            array(
-                                new Constraint('>=', '1.0.0.0-dev'),
-                                new Constraint('<', '2.0.0.0-dev'),
-                                new Constraint('!=', '1.0.1.0'),
-                            ),
-                            true // conjunctive
-                        ),
+                        new Constraint('>=', '0.1.0.0-dev'),
+                        new Constraint('<', '2.0.0.0-dev'),
+                        new Constraint('!=', '1.0.1.0'),
                     ),
-                    false
+                    true // conjunctive
                 )
             ),
             'Parse caret constraints must not collapse if non contiguous range' => array(