diff --git a/ChangeLog-7.5.md b/ChangeLog-7.5.md
index 87f4d6d6490..2b12480374a 100644
--- a/ChangeLog-7.5.md
+++ b/ChangeLog-7.5.md
@@ -2,6 +2,12 @@
 
 All notable changes of the PHPUnit 7.5 release series are documented in this file using the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
 
+## [7.5.9] - 2019-MM-DD
+
+### Fixed
+
+* Fixed [#3607](https://github.com/sebastianbergmann/phpunit/issues/3607): Return value generation interferes with proxying to original method
+
 ## [7.5.8] - 2019-03-26
 
 ### Fixed
@@ -87,6 +93,7 @@ All notable changes of the PHPUnit 7.5 release series are documented in this fil
 * Fixed [#3429](https://github.com/sebastianbergmann/phpunit/pull/3429): Inefficient loop in `getHookMethods()`
 * Fixed [#3437](https://github.com/sebastianbergmann/phpunit/pull/3437): JUnit logger skips PHPT tests
 
+[7.5.9]: https://github.com/sebastianbergmann/phpunit/compare/7.5.8...7.5.9
 [7.5.8]: https://github.com/sebastianbergmann/phpunit/compare/7.5.7...7.5.8
 [7.5.7]: https://github.com/sebastianbergmann/phpunit/compare/7.5.6...7.5.7
 [7.5.6]: https://github.com/sebastianbergmann/phpunit/compare/7.5.5...7.5.6
diff --git a/src/Framework/MockObject/Generator/proxied_method.tpl.dist b/src/Framework/MockObject/Generator/proxied_method.tpl.dist
index fd9e71b8a54..96893e4ec3a 100644
--- a/src/Framework/MockObject/Generator/proxied_method.tpl.dist
+++ b/src/Framework/MockObject/Generator/proxied_method.tpl.dist
@@ -12,11 +12,13 @@
             }
         }
 
-        $this->__phpunit_getInvocationMocker()->invoke(
-            new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
-                '{class_name}', '{method_name}', $__phpunit_arguments, '{return_type}', $this, {clone_arguments}
-            )
+        $invocation = new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
+            '{class_name}', '{method_name}', $__phpunit_arguments, '{return_type}', $this, {clone_arguments}
         );
 
+        $invocation->setProxiedCall();
+
+        $this->__phpunit_getInvocationMocker()->invoke($invocation);
+
         return call_user_func_array(array($this->__phpunit_originalObject, "{method_name}"), $__phpunit_arguments);
     }
diff --git a/src/Framework/MockObject/Generator/proxied_method_void.tpl.dist b/src/Framework/MockObject/Generator/proxied_method_void.tpl.dist
index 63c337bc59b..9b209becdf8 100644
--- a/src/Framework/MockObject/Generator/proxied_method_void.tpl.dist
+++ b/src/Framework/MockObject/Generator/proxied_method_void.tpl.dist
@@ -12,11 +12,13 @@
             }
         }
 
-        $this->__phpunit_getInvocationMocker()->invoke(
-            new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
-                '{class_name}', '{method_name}', $__phpunit_arguments, '{return_type}', $this, {clone_arguments}
-            )
+        $invocation = new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
+            '{class_name}', '{method_name}', $__phpunit_arguments, '{return_type}', $this, {clone_arguments}
         );
 
+        $invocation->setProxiedCall();
+
+        $this->__phpunit_getInvocationMocker()->invoke($invocation);
+
         call_user_func_array(array($this->__phpunit_originalObject, "{method_name}"), $__phpunit_arguments);
     }
diff --git a/src/Framework/MockObject/Invocation/StaticInvocation.php b/src/Framework/MockObject/Invocation/StaticInvocation.php
index 61be6002e06..7d87488ca44 100644
--- a/src/Framework/MockObject/Invocation/StaticInvocation.php
+++ b/src/Framework/MockObject/Invocation/StaticInvocation.php
@@ -70,6 +70,11 @@ class StaticInvocation implements Invocation, SelfDescribing
      */
     private $isReturnTypeNullable = false;
 
+    /**
+     * @var bool
+     */
+    private $proxiedCall = false;
+
     /**
      * @param string $className
      * @param string $methodName
@@ -138,7 +143,7 @@ public function isReturnTypeNullable(): bool
      */
     public function generateReturnValue()
     {
-        if ($this->isReturnTypeNullable) {
+        if ($this->isReturnTypeNullable || $this->proxiedCall) {
             return;
         }
 
@@ -186,6 +191,11 @@ public function generateReturnValue()
         }
     }
 
+    public function setProxiedCall(): void
+    {
+        $this->proxiedCall = true;
+    }
+
     public function toString(): string
     {
         $exporter = new Exporter;
diff --git a/tests/end-to-end/mock-objects/generator/proxy.phpt b/tests/end-to-end/mock-objects/generator/proxy.phpt
index 45272591b60..c5f6ba76cb0 100644
--- a/tests/end-to-end/mock-objects/generator/proxy.phpt
+++ b/tests/end-to-end/mock-objects/generator/proxy.phpt
@@ -49,12 +49,14 @@ class ProxyFoo extends Foo implements PHPUnit\Framework\MockObject\MockObject
             }
         }
 
-        $this->__phpunit_getInvocationMocker()->invoke(
-            new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
-                'Foo', 'bar', $__phpunit_arguments, '', $this, true
-            )
+        $invocation = new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
+            'Foo', 'bar', $__phpunit_arguments, '', $this, true
         );
 
+        $invocation->setProxiedCall();
+
+        $this->__phpunit_getInvocationMocker()->invoke($invocation);
+
         return call_user_func_array(array($this->__phpunit_originalObject, "bar"), $__phpunit_arguments);
     }
 
@@ -71,12 +73,14 @@ class ProxyFoo extends Foo implements PHPUnit\Framework\MockObject\MockObject
             }
         }
 
-        $this->__phpunit_getInvocationMocker()->invoke(
-            new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
-                'Foo', 'baz', $__phpunit_arguments, '', $this, true
-            )
+        $invocation = new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
+            'Foo', 'baz', $__phpunit_arguments, '', $this, true
         );
 
+        $invocation->setProxiedCall();
+
+        $this->__phpunit_getInvocationMocker()->invoke($invocation);
+
         return call_user_func_array(array($this->__phpunit_originalObject, "baz"), $__phpunit_arguments);
     }
 
diff --git a/tests/end-to-end/mock-objects/mock-method/call_original.phpt b/tests/end-to-end/mock-objects/mock-method/call_original.phpt
index 4195be7f3c3..acf41265ae4 100644
--- a/tests/end-to-end/mock-objects/mock-method/call_original.phpt
+++ b/tests/end-to-end/mock-objects/mock-method/call_original.phpt
@@ -35,11 +35,13 @@ print $code;
             }
         }
 
-        $this->__phpunit_getInvocationMocker()->invoke(
-            new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
-                'Foo', 'bar', $__phpunit_arguments, '', $this, false
-            )
+        $invocation = new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
+            'Foo', 'bar', $__phpunit_arguments, '', $this, false
         );
 
+        $invocation->setProxiedCall();
+
+        $this->__phpunit_getInvocationMocker()->invoke($invocation);
+
         return call_user_func_array(array($this->__phpunit_originalObject, "bar"), $__phpunit_arguments);
     }
diff --git a/tests/end-to-end/mock-objects/mock-method/call_original_with_argument.phpt b/tests/end-to-end/mock-objects/mock-method/call_original_with_argument.phpt
index cff9ab6d0ae..91cde635f66 100644
--- a/tests/end-to-end/mock-objects/mock-method/call_original_with_argument.phpt
+++ b/tests/end-to-end/mock-objects/mock-method/call_original_with_argument.phpt
@@ -35,11 +35,13 @@ private function bar($arg)
             }
         }
 
-        $this->__phpunit_getInvocationMocker()->invoke(
-            new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
-                'Foo', 'bar', $__phpunit_arguments, '', $this, false
-            )
+        $invocation = new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
+            'Foo', 'bar', $__phpunit_arguments, '', $this, false
         );
 
+        $invocation->setProxiedCall();
+
+        $this->__phpunit_getInvocationMocker()->invoke($invocation);
+
         return call_user_func_array(array($this->__phpunit_originalObject, "bar"), $__phpunit_arguments);
     }
diff --git a/tests/end-to-end/mock-objects/mock-method/call_original_with_argument_variadic.phpt b/tests/end-to-end/mock-objects/mock-method/call_original_with_argument_variadic.phpt
index 8580ab1426f..e35d7bbaa58 100644
--- a/tests/end-to-end/mock-objects/mock-method/call_original_with_argument_variadic.phpt
+++ b/tests/end-to-end/mock-objects/mock-method/call_original_with_argument_variadic.phpt
@@ -35,11 +35,13 @@ private function bar(...$args)
             }
         }
 
-        $this->__phpunit_getInvocationMocker()->invoke(
-            new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
-                'Foo', 'bar', $__phpunit_arguments, '', $this, false
-            )
+        $invocation = new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
+            'Foo', 'bar', $__phpunit_arguments, '', $this, false
         );
 
+        $invocation->setProxiedCall();
+
+        $this->__phpunit_getInvocationMocker()->invoke($invocation);
+
         return call_user_func_array(array($this->__phpunit_originalObject, "bar"), $__phpunit_arguments);
     }
diff --git a/tests/end-to-end/mock-objects/mock-method/call_original_with_return_type_void.phpt b/tests/end-to-end/mock-objects/mock-method/call_original_with_return_type_void.phpt
index d9512b8a418..b93fd8a5075 100644
--- a/tests/end-to-end/mock-objects/mock-method/call_original_with_return_type_void.phpt
+++ b/tests/end-to-end/mock-objects/mock-method/call_original_with_return_type_void.phpt
@@ -35,11 +35,13 @@ print $code;
             }
         }
 
-        $this->__phpunit_getInvocationMocker()->invoke(
-            new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
-                'Foo', 'bar', $__phpunit_arguments, 'void', $this, false
-            )
+        $invocation = new \PHPUnit\Framework\MockObject\Invocation\ObjectInvocation(
+            'Foo', 'bar', $__phpunit_arguments, 'void', $this, false
         );
 
+        $invocation->setProxiedCall();
+
+        $this->__phpunit_getInvocationMocker()->invoke($invocation);
+
         call_user_func_array(array($this->__phpunit_originalObject, "bar"), $__phpunit_arguments);
     }