diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5c214c15..202a7e14 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -104,7 +104,7 @@ jobs:
           - "'++3.7.3 scripted'"
         include:
           - java: 17
-            command: "'++3.8.2!; unit/test; worksheets/test'"
+            command: "'++3.8.3-RC1!; unit/test; worksheets/test'"
     steps:
       - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
diff --git a/mdoc-sbt/src/sbt-test/sbt-mdoc/basic/build.sbt b/mdoc-sbt/src/sbt-test/sbt-mdoc/basic/build.sbt
index 4f0e43fb..ffdb4a98 100644
--- a/mdoc-sbt/src/sbt-test/sbt-mdoc/basic/build.sbt
+++ b/mdoc-sbt/src/sbt-test/sbt-mdoc/basic/build.sbt
@@ -6,7 +6,7 @@ ThisBuild / crossScalaVersions := {
     "3.3.7"
   )
   val javaVersion = sys.props("java.specification.version").toDouble
-  if (javaVersion >= 17) baseVersions :+ "3.8.2"
+  if (javaVersion >= 17) baseVersions :+ "3.8.3-RC1"
   else baseVersions
 }
 
diff --git a/mdoc-sbt/src/sbt-test/sbt-mdoc/basic/test b/mdoc-sbt/src/sbt-test/sbt-mdoc/basic/test
index 336fab6c..819030dd 100644
--- a/mdoc-sbt/src/sbt-test/sbt-mdoc/basic/test
+++ b/mdoc-sbt/src/sbt-test/sbt-mdoc/basic/test
@@ -4,7 +4,7 @@
 > check
 > ++3.3.7 mdoc
 > check
-> ++3.8.2 mdoc
+> ++3.8.3-RC1 mdoc
 > check
 > set mdocIn := (ThisBuild / baseDirectory).value
 -> mdoc
diff --git a/tests/unit/src/test/scala/tests/markdown/AsyncSuite.scala b/tests/unit/src/test/scala/tests/markdown/AsyncSuite.scala
index c16964bf..62dbce8c 100644
--- a/tests/unit/src/test/scala/tests/markdown/AsyncSuite.scala
+++ b/tests/unit/src/test/scala/tests/markdown/AsyncSuite.scala
@@ -83,11 +83,11 @@ class AsyncSuite extends BaseMarkdownSuite {
            |Await.result(Future(Thread.sleep(1000)), Duration("10ms"))
            |^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
            |java.util.concurrent.TimeoutException: Future timed out after [10 milliseconds]
-           | at scala.concurrent.Future$.timeoutError(Future.scala:582)
-           | at scala.concurrent.impl.Promise$DefaultPromise.tryAwait0(Promise.scala:261)
-           | at scala.concurrent.impl.Promise$DefaultPromise.result(Promise.scala:274)
+           | at scala.concurrent.Future$.timeoutError(Future.scala:580)
+           | at scala.concurrent.impl.Promise$DefaultPromise.tryAwait0(Promise.scala:247)
+           | at scala.concurrent.impl.Promise$DefaultPromise.result(Promise.scala:260)
            | at scala.concurrent.Await$.result$$anonfun$1(package.scala:209)
-           | at scala.concurrent.BlockContext$DefaultBlockContext$.blockOn(BlockContext.scala:64)
+           | at scala.concurrent.BlockContext$DefaultBlockContext$.blockOn(BlockContext.scala:63)
            | at scala.concurrent.package$.blocking(package.scala:126)
            | at scala.concurrent.Await$.result(package.scala:209)
            | at repl.MdocSession$MdocApp.<clinit>(timeout.md:13)
diff --git a/tests/unit/src/test/scala/tests/markdown/CrashSuite.scala b/tests/unit/src/test/scala/tests/markdown/CrashSuite.scala
index 04ca13b0..ca067328 100644
--- a/tests/unit/src/test/scala/tests/markdown/CrashSuite.scala
+++ b/tests/unit/src/test/scala/tests/markdown/CrashSuite.scala
@@ -34,7 +34,7 @@ class CrashSuite extends BaseMarkdownSuite {
            |val x = 1
            |???
            |// scala.NotImplementedError: an implementation is missing
-           |//  at scala.Predef$.$qmark$qmark$qmark(Predef.scala:387)
+           |//  at scala.Predef$.$qmark$qmark$qmark(Predef.scala:383)
            |//  at repl.MdocSession$MdocApp.$init$$$anonfun$1(basic.md:9)
            |```
     """.stripMargin,
@@ -154,7 +154,7 @@ class CrashSuite extends BaseMarkdownSuite {
         """|```scala
            |???
            |// scala.NotImplementedError: an implementation is missing
-           |//  at scala.Predef$.$qmark$qmark$qmark(Predef.scala:387)
+           |//  at scala.Predef$.$qmark$qmark$qmark(Predef.scala:383)
            |//  at repl.MdocSession$MdocApp.$init$$$anonfun$1(relative.md:8)
            |```
     """.stripMargin,
@@ -346,7 +346,7 @@ class CrashSuite extends BaseMarkdownSuite {
            |class Cat { def func = ??? }
            |(new Cat).func
            |// scala.NotImplementedError: an implementation is missing
-           |//  at scala.Predef$.$qmark$qmark$qmark(Predef.scala:387)
+           |//  at scala.Predef$.$qmark$qmark$qmark(Predef.scala:383)
            |//  at repl.MdocSession$MdocApp$Cat$1.func(multiple-statements.md:8)
            |//  at repl.MdocSession$MdocApp.$init$$$anonfun$1(multiple-statements.md:9)
            |```""".stripMargin,