diff --git a/project/TestJDeps.scala b/project/TestJDeps.scala
index 7dfa69c4745..4d76b43d710 100644
--- a/project/TestJDeps.scala
+++ b/project/TestJDeps.scala
@@ -1,21 +1,29 @@
 package scala.build
 
 import sbt._, Keys._
+import scala.util.Properties.isJavaAtLeast
 
 object TestJDeps {
   val testJDepsImpl: Def.Initialize[Task[Unit]] = Def.task {
     val libraryJar = (LocalProject("library") / Compile / packageBin).value
     val reflectJar = (LocalProject("reflect") / Compile / packageBin).value
+    val log = streams.value.log
+    // in JDK 22, the already-deprecated `-P` option to jdeps was removed,
+    // so we can't do the test. it's fine -- it will be a long, long time
+    // (probably never) before Scala 2's minimum JVM version is 22+
+    if (isJavaAtLeast("22"))
+      log.info("can't test jdeps on JDK 22+")
+    else {
+      // jdeps -s -P build/pack/lib/scala-{library,reflect}.jar | grep -v build/pack | perl -pe 's/.*\((.*)\)$/$1/' | sort -u
+      val jdepsOut = scala.sys.process.Process("jdeps", Seq("-s", "-P", libraryJar.getPath, reflectJar.getPath)).lineStream
 
-    // jdeps -s -P build/pack/lib/scala-{library,reflect}.jar | grep -v build/pack | perl -pe 's/.*\((.*)\)$/$1/' | sort -u
-    val jdepsOut = scala.sys.process.Process("jdeps", Seq("-s", "-P", libraryJar.getPath, reflectJar.getPath)).lineStream
+      val profilePart = ".*\\((.*)\\)$".r
+      val profiles = jdepsOut.collect {
+        case profilePart(profile) => profile
+      }.toSet
 
-    val profilePart = ".*\\((.*)\\)$".r
-    val profiles = jdepsOut.collect {
-      case profilePart(profile) => profile
-    }.toSet
-
-    if (profiles != Set("compact1"))
-      throw new RuntimeException(jdepsOut.mkString("Detected dependency outside of compact1:\n", "\n", ""))
+      if (profiles != Set("compact1"))
+        throw new RuntimeException(jdepsOut.mkString("Detected dependency outside of compact1:\n", "\n", ""))
+    }
   }
 }