diff --git a/.psalm/baseline.xml b/.psalm/baseline.xml
index 4665a287693..812b61bc500 100644
--- a/.psalm/baseline.xml
+++ b/.psalm/baseline.xml
@@ -905,7 +905,7 @@
       <code>getResult</code>
       <code>runTest</code>
     </MissingReturnType>
-    <MissingThrowsDocblock occurrences="17">
+    <MissingThrowsDocblock occurrences="18">
       <code>endTest</code>
       <code>endTest</code>
       <code>endTest</code>
@@ -919,6 +919,7 @@
       <code>getMockForTrait</code>
       <code>getObjectForTrait</code>
       <code>new Differ($header)</code>
+      <code>throw new Exception('This test uses TestCase::prophesize(), but phpspec/prophecy is not installed. Please run "composer require --dev phpspec/prophecy".');</code>
     </MissingThrowsDocblock>
     <PossiblyNullPropertyAssignmentValue occurrences="4">
       <code>$beStrictAboutChangesToGlobalState</code>
diff --git a/ChangeLog-8.5.md b/ChangeLog-8.5.md
index 42b4923edde..04ec1cea919 100644
--- a/ChangeLog-8.5.md
+++ b/ChangeLog-8.5.md
@@ -2,6 +2,12 @@
 
 All notable changes of the PHPUnit 8.5 release series are documented in this file using the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
 
+## [8.5.29] - 2022-MM-DD
+
+### Changed
+
+* [#5033](https://github.com/sebastianbergmann/phpunit/issues/5033): Do not depend on phpspec/prophecy
+
 ## [8.5.28] - 2022-07-29
 
 ### Fixed
@@ -233,6 +239,7 @@ All notable changes of the PHPUnit 8.5 release series are documented in this fil
 * [#3967](https://github.com/sebastianbergmann/phpunit/issues/3967): Cannot double interface that extends interface that extends `\Throwable`
 * [#3968](https://github.com/sebastianbergmann/phpunit/pull/3968): Test class run in a separate PHP process are passing when `exit` called inside
 
+[8.5.29]: https://github.com/sebastianbergmann/phpunit/compare/8.5.28...8.5
 [8.5.28]: https://github.com/sebastianbergmann/phpunit/compare/8.5.27...8.5.28
 [8.5.27]: https://github.com/sebastianbergmann/phpunit/compare/8.5.26...8.5.27
 [8.5.26]: https://github.com/sebastianbergmann/phpunit/compare/8.5.25...8.5.26
diff --git a/build.xml b/build.xml
index 2e5e781fc00..64916192374 100644
--- a/build.xml
+++ b/build.xml
@@ -124,7 +124,30 @@
         </antcall>
     </target>
 
-    <target name="-phar-prepare" depends="clean,install-dependencies">
+    <target name="-phar-prepare" depends="clean">
+        <copy file="${basedir}/composer.json" tofile="${basedir}/build/tmp/composer.json"/>
+
+        <exec executable="${basedir}/tools/composer" taskname="composer">
+            <arg value="require"/>
+            <arg value="--no-update"/>
+            <arg value="phpunit/php-invoker:^2.0"/>
+        </exec>
+
+        <exec executable="${basedir}/tools/composer" taskname="composer">
+            <arg value="require"/>
+            <arg value="--no-update"/>
+            <arg value="phpspec/prophecy:^1.10.3"/>
+        </exec>
+
+        <exec executable="${basedir}/tools/composer" taskname="composer">
+            <arg value="update"/>
+            <arg value="--no-interaction"/>
+            <arg value="--no-progress"/>
+            <arg value="--no-ansi"/>
+        </exec>
+
+        <move file="${basedir}/build/tmp/composer.json" tofile="${basedir}/composer.json"/>
+
         <mkdir dir="${basedir}/build/artifacts"/>
         <mkdir dir="${basedir}/build/tmp/phar"/>
         <mkdir dir="${basedir}/build/tmp/phar-scoped"/>
@@ -330,6 +353,11 @@
                 <include name="**/*.php" />
             </fileset>
         </copy>
+
+        <exec executable="${basedir}/tools/composer" taskname="composer">
+            <arg value="remove"/>
+            <arg value="phpspec/prophecy"/>
+        </exec>
     </target>
 
     <target name="-phar-build" depends="-phar-determine-version">
diff --git a/composer.json b/composer.json
index 88e22906a66..8bcd2a90b89 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,6 @@
         "myclabs/deep-copy": "^1.10.0",
         "phar-io/manifest": "^2.0.3",
         "phar-io/version": "^3.0.2",
-        "phpspec/prophecy": "^1.10.3",
         "phpunit/php-code-coverage": "^7.0.12",
         "phpunit/php-file-iterator": "^2.0.4",
         "phpunit/php-text-template": "^1.2.1",
diff --git a/src/Framework/TestCase.php b/src/Framework/TestCase.php
index 7656a66c0a5..dec0cb3e5a9 100644
--- a/src/Framework/TestCase.php
+++ b/src/Framework/TestCase.php
@@ -1953,6 +1953,10 @@ protected function getObjectForTrait($traitName, array $arguments = [], $traitCl
      */
     protected function prophesize($classOrInterface = null): ObjectProphecy
     {
+        if (!class_exists(Prophet::class)) {
+            throw new Exception('This test uses TestCase::prophesize(), but phpspec/prophecy is not installed. Please run "composer require --dev phpspec/prophecy".');
+        }
+
         if (is_string($classOrInterface)) {
             $this->recordDoubledType($classOrInterface);
         }