diff --git a/src/Composer/DependencyResolver/Operation/MarkAliasInstalledOperation.php b/src/Composer/DependencyResolver/Operation/MarkAliasInstalledOperation.php
index 4638709ed..072ac702a 100644
--- a/src/Composer/DependencyResolver/Operation/MarkAliasInstalledOperation.php
+++ b/src/Composer/DependencyResolver/Operation/MarkAliasInstalledOperation.php
@@ -61,6 +61,6 @@ class MarkAliasInstalledOperation extends SolverOperation
      */
     public function __toString()
     {
-        return 'Marking '.$this->package->getPrettyName().' ('.$this->package->getPrettyVersion().') as installed, alias of '.$this->package->getAliasOf()->getPrettyName().' ('.$this->package->getAliasOf()->getPrettyVersion().')';
+        return 'Marking '.$this->package->getPrettyName().' ('.$this->formatVersion($this->package).') as installed, alias of '.$this->package->getAliasOf()->getPrettyName().' ('.$this->formatVersion($this->package->getAliasOf()).')';
     }
 }
diff --git a/src/Composer/DependencyResolver/Operation/MarkAliasUninstalledOperation.php b/src/Composer/DependencyResolver/Operation/MarkAliasUninstalledOperation.php
index 648356df5..f1cd6c040 100644
--- a/src/Composer/DependencyResolver/Operation/MarkAliasUninstalledOperation.php
+++ b/src/Composer/DependencyResolver/Operation/MarkAliasUninstalledOperation.php
@@ -61,6 +61,6 @@ class MarkAliasUninstalledOperation extends SolverOperation
      */
     public function __toString()
     {
-        return 'Marking '.$this->package->getPrettyName().' ('.$this->package->getPrettyVersion().') as uninstalled, alias of '.$this->package->getAliasOf()->getPrettyName().' ('.$this->package->getAliasOf()->getPrettyVersion().')';
+        return 'Marking '.$this->package->getPrettyName().' ('.$this->formatVersion($this->package).') as uninstalled, alias of '.$this->package->getAliasOf()->getPrettyName().' ('.$this->formatVersion($this->package->getAliasOf()).')';
     }
 }
diff --git a/tests/Composer/Test/Fixtures/installer/aliased-priority.test b/tests/Composer/Test/Fixtures/installer/aliased-priority.test
new file mode 100644
index 000000000..1b5226fad
--- /dev/null
+++ b/tests/Composer/Test/Fixtures/installer/aliased-priority.test
@@ -0,0 +1,53 @@
+--TEST--
+Aliases take precedence over default package
+--COMPOSER--
+{
+    "repositories": [
+        {
+            "type": "package",
+            "package": [
+                {
+                    "name": "a/c", "version": "dev-feature-foo",
+                    "source": { "reference": "feat.f", "type": "git", "url": "" }
+                },
+                {
+                    "name": "a/b", "version": "dev-master",
+                    "extra": { "branch-alias": { "dev-master": "1.0.x-dev" } },
+                    "source": { "reference": "forked", "type": "git", "url": "" }
+                }
+            ]
+        },
+        {
+            "type": "package",
+            "package": [
+                {
+                    "name": "a/a", "version": "dev-master",
+                    "extra": { "branch-alias": { "dev-master": "1.0.x-dev" } },
+                    "source": { "reference": "master", "type": "git", "url": "" },
+                    "require": {
+                        "a/b": "dev-master",
+                        "a/c": "dev-master"
+                    }
+                },
+                {
+                    "name": "a/b", "version": "dev-master",
+                    "extra": { "branch-alias": { "dev-master": "1.0.x-dev" } },
+                    "source": { "reference": "master", "type": "git", "url": "" }
+                },
+                { "name": "a/c", "version": "dev-master" }
+            ]
+        }
+    ],
+    "require": {
+        "a/a": "1.*",
+        "a/b": "1.*",
+        "a/c": "dev-feature-foo as dev-master"
+    }
+}
+--EXPECT--
+Installing a/c (dev-feature-foo feat.f)
+Marking a/c (dev-master feat.f) as installed, alias of a/c (dev-feature-foo feat.f)
+Installing a/b (dev-master forked)
+Marking a/b (1.0.x-dev forked) as installed, alias of a/b (dev-master forked)
+Installing a/a (dev-master master)
+Marking a/a (1.0.x-dev master) as installed, alias of a/a (dev-master master)
diff --git a/tests/Composer/Test/InstallerTest.php b/tests/Composer/Test/InstallerTest.php
index b6a809dc1..20a8c14cf 100644
--- a/tests/Composer/Test/InstallerTest.php
+++ b/tests/Composer/Test/InstallerTest.php
@@ -196,13 +196,14 @@ class InstallerTest extends TestCase
 
             $test = file_get_contents($file->getRealpath());
 
+            $content = '(?:.(?!--[A-Z]))+';
             $pattern = '{^
                 --TEST--\s*(?P<test>.*?)\s*
-                (?:--CONDITION--\s*(?P<condition>.*?))?\s*
-                --COMPOSER--\s*(?P<composer>.*?)\s*
-                (?:--LOCK--\s*(?P<lock>.*?))?\s*
-                (?:--INSTALLED--\s*(?P<installed>.*?))?\s*
-                (?:--INSTALLED:DEV--\s*(?P<installedDev>.*?))?\s*
+                (?:--CONDITION--\s*(?P<condition>'.$content.'))?\s*
+                --COMPOSER--\s*(?P<composer>'.$content.')\s*
+                (?:--LOCK--\s*(?P<lock>'.$content.'))?\s*
+                (?:--INSTALLED--\s*(?P<installed>'.$content.'))?\s*
+                (?:--INSTALLED:DEV--\s*(?P<installedDev>'.$content.'))?\s*
                 --EXPECT(?P<update>:UPDATE)?(?P<dev>:DEV)?--\s*(?P<expect>.*?)\s*
             $}xs';
 
diff --git a/tests/Composer/Test/Mock/InstallationManagerMock.php b/tests/Composer/Test/Mock/InstallationManagerMock.php
index 6474d1637..88724a7a5 100644
--- a/tests/Composer/Test/Mock/InstallationManagerMock.php
+++ b/tests/Composer/Test/Mock/InstallationManagerMock.php
@@ -17,6 +17,8 @@ use Composer\DependencyResolver\Operation\OperationInterface;
 use Composer\DependencyResolver\Operation\InstallOperation;
 use Composer\DependencyResolver\Operation\UpdateOperation;
 use Composer\DependencyResolver\Operation\UninstallOperation;
+use Composer\DependencyResolver\Operation\MarkAliasInstalledOperation;
+use Composer\DependencyResolver\Operation\MarkAliasUninstalledOperation;
 
 class InstallationManagerMock extends InstallationManager
 {
@@ -47,6 +49,20 @@ class InstallationManagerMock extends InstallationManager
         $repo->removePackage($operation->getPackage());
     }
 
+    public function markAliasInstalled(RepositoryInterface $repo, MarkAliasInstalledOperation $operation)
+    {
+        $this->installed[] = $operation->getPackage();
+        $this->trace[] = (string) $operation;
+        $repo->addPackage(clone $operation->getPackage());
+    }
+
+    public function markAliasUninstalled(RepositoryInterface $repo, MarkAliasUninstalledOperation $operation)
+    {
+        $this->uninstalled[] = $operation->getPackage();
+        $this->trace[] = (string) $operation;
+        $repo->removePackage($operation->getPackage());
+    }
+
     public function getTrace()
     {
         return $this->trace;