diff --git a/config/VERSION b/config/VERSION
index 903cd9f2a..d95827c3d 100644
--- a/config/VERSION
+++ b/config/VERSION
@@ -1 +1 @@
-v3.1.1
+v3.1.2
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 803d590f2..f91cc3554 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## [v3.1.2](https://github.com/acquia/orca/tree/v3.1.2) (2020-12-14)
+
+[Full Changelog](https://github.com/acquia/orca/compare/v3.1.1...v3.1.2)
+
+**Fixed bugs:**
+
+- Add workaround for "Call to undefined method ::getAnnotations\(\)" error [\#120](https://github.com/acquia/orca/pull/120) ([TravisCarden](https://github.com/TravisCarden))
+
 ## [v3.1.1](https://github.com/acquia/orca/tree/v3.1.1) (2020-12-04)
 
 [Full Changelog](https://github.com/acquia/orca/compare/v3.1.0...v3.1.1)
diff --git a/src/Domain/Fixture/FixtureCreator.php b/src/Domain/Fixture/FixtureCreator.php
index c26a1dd0d..eff0c69f0 100644
--- a/src/Domain/Fixture/FixtureCreator.php
+++ b/src/Domain/Fixture/FixtureCreator.php
@@ -264,6 +264,10 @@ private function fixDefaultDependencies(): void {
       $additions[] = 'phpspec/prophecy-phpunit:^2';
     }
 
+    if ($this->shouldDowngradePhpunit()) {
+      $additions[] = 'phpunit/phpunit:9.4.3';
+    }
+
     // Require additional packages.
     $prefer_source = $this->options->preferSource();
     $no_update = !$this->options->isBare();
@@ -316,6 +320,21 @@ private function shouldRequireProphecyPhpunit(): bool {
     return $required->matches($actual);
   }
 
+  /**
+   * Determines whether or not to downgrade PHPUnit.
+   *
+   * Workaround for "Call to undefined method ::getAnnotations()" error."
+   *
+   * @see https://www.drupal.org/project/drupal/issues/3186443
+   *
+   * @return bool
+   *   Returns TRUE if it should be downgraded, or FALSE if not.
+   */
+  private function shouldDowngradePhpunit(): bool {
+    $version = $this->options->getCoreResolved();
+    return Comparator::equalTo($version, '9.1.0.0');
+  }
+
   /**
    * Gets the list of unwanted packages.
    *