diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d8b73b7..08a6571 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        stack: ["heroku-20", "heroku-22"]
+        stack: ["heroku-20", "heroku-22", "heroku-24"]
     env:
       HATCHET_APP_LIMIT: 100
       HATCHET_RUN_MULTI: 1
diff --git a/test/compile_test.sh b/test/compile_test.sh
index e2df8f8..e4f3f2f 100644
--- a/test/compile_test.sh
+++ b/test/compile_test.sh
@@ -2,9 +2,8 @@
 
 . ${BUILDPACK_TEST_RUNNER_HOME}/lib/test_utils.sh
 
-DEFAULT_SBT_VERSION="0.13.17"
-DEFAULT_PLAY_VERSION="2.3.4"
-DEFAULT_SCALA_VERSION="2.12.7"
+DEFAULT_SBT_VERSION="1.10.0"
+DEFAULT_SCALA_VERSION="2.13.14"
 SBT_TEST_CACHE="/tmp/sbt-test-cache"
 SBT_STAGING_STRING="THIS_STRING_WILL_BE_OUTPUT_DURING_STAGING"
 
@@ -37,73 +36,10 @@ sbt.version=${sbtVersion}
 EOF
 }
 
-_primeSbtTestCache()
-{
-  local sbtVersion=${1:-${DEFAULT_SBT_VERSION}}
-
-  # exit code of app compile is cached so it is consistant between runn
-  local compileStatusFile=${SBT_TEST_CACHE}/${sbtVersion}/app/compile_status
-
-  if [ ! -f ${compileStatusFile} ]; then
-    [ -d ${SBT_TEST_CACHE}/${sbtVersion} ] && rm -r ${SBT_TEST_CACHE}/${sbtVersion}
-
-    ORIGINAL_BUILD_DIR=${BUILD_DIR}
-    ORIGINAL_CACHE_DIR=${CACHE_DIR}
-
-    BUILD_DIR=${SBT_TEST_CACHE}/${sbtVersion}/app/build
-    CACHE_DIR=${SBT_TEST_CACHE}/${sbtVersion}/app/cache
-    mkdir -p ${BUILD_DIR} ${CACHE_DIR}
-
-    _createSbtProject ${sbtVersion} ${BUILD_DIR}
-    ${BUILDPACK_HOME}/bin/compile ${BUILD_DIR} ${CACHE_DIR} >/dev/null 2>&1
-    echo "$?" > ${compileStatusFile}
-
-    BUILD_DIR=${ORIGINAL_BUILD_DIR}
-    CACHE_DIR=${ORIGINAL_CACHE_DIR}
-  fi
-
-  return $(cat ${compileStatusFile})
-}
-
-_primeIvyCache()
-{
-  local sbtVersion=${1:-${DEFAULT_SBT_VERSION}}
-
-  ivy2_path=.sbt_home/.ivy2
-  mkdir -p ${CACHE_DIR}/${ivy2_path}
-  _primeSbtTestCache ${sbtVersion} && cp -r ${SBT_TEST_CACHE}/${sbtVersion}/app/cache/${ivy2_path}/cache ${CACHE_DIR}/${ivy2_path}
-}
-
-createPlayProject()
-{
-  local playVersion=${1:-${DEFAULT_PLAY_VERSION}}
-  local sbtVersion=${2:-${DEFAULT_SBT_VERSION}}
-  local scalaVersion=${3:-${DEFAULT_SCALA_VERSION}}
-
-  mkdir -p ${BUILD_DIR}/conf ${BUILD_DIR}/project
-  touch ${BUILD_DIR}/conf/application.conf
-  cat > ${BUILD_DIR}/project/plugins.sbt <<EOF
-resolvers += "Typesafe repository" at "http://repo.typesafe.com/typesafe/releases/"
-
-addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "${playVersion}")
-EOF
-
-  cat > ${BUILD_DIR}/build.sbt <<EOF
-scalaVersion := "${scalaVersion}"
-
-TaskKey[Unit]("stage") in Compile := { println("${SBT_STAGING_STRING}") }
-EOF
-
-  cat > ${BUILD_DIR}/project/build.properties <<EOF
-sbt.version=${sbtVersion}
-EOF
-}
-
 createSbtProject()
 {
   local sbtVersion=${1:-${DEFAULT_SBT_VERSION}}
 
-  _primeIvyCache ${sbtVersion}
   _createSbtProject ${sbtVersion}
 }
 
@@ -114,8 +50,6 @@ testCompile()
   createSbtProject
 
   # create `testfile`s in CACHE_DIR and later assert `compile` copied them to BUILD_DIR
-  mkdir -p ${CACHE_DIR}/.sbt_home/.ivy2
-  touch    ${CACHE_DIR}/.sbt_home/.ivy2/testfile
   mkdir -p ${CACHE_DIR}/.sbt_home/bin
   touch    ${CACHE_DIR}/.sbt_home/bin/testfile
 
@@ -128,7 +62,6 @@ testCompile()
   assertEquals 0 "${RETURN}"
 
  # setup
-  assertTrue "Ivy2 cache should have been repacked." "[ -d ${BUILD_DIR}/.sbt_home/.ivy2 ]"
   assertTrue "SBT bin cache should have been unpacked" "[ -f ${BUILD_DIR}/.sbt_home/bin/testfile ]"
   assertFalse "Old SBT launch jar should have been deleted" "[ -f ${BUILD_DIR}/.sbt_home/bin/sbt-launch-OLD.jar ]"
   assertTrue "sbt launch script should be created" "[ -f ${BUILD_DIR}/.sbt_home/bin/sbt ]"
@@ -143,14 +76,12 @@ testCompile()
   assertTrue "system.properties was not cached" "[ -f $CACHE_DIR/system.properties ]"
 
   # clean up
-  assertEquals "Ivy2 cache should have been repacked for a non-play project" "" "$(diff -r ${BUILD_DIR}/.sbt_home/.ivy2 ${CACHE_DIR}/.sbt_home/.ivy2)"
   assertEquals "SBT home should have been repacked" "" "$(diff -r ${BUILD_DIR}/.sbt_home/bin ${CACHE_DIR}/.sbt_home/bin)"
 
   # re-deploy
   compile
 
   assertEquals 0 "${RETURN}"
-  assertNotCaptured "Ivy cache should not be primed on re-run" "Priming Ivy Cache"
   assertNotCaptured "SBT should not be re-installed on re-run" "Building app with sbt"
 
   # Something is wrong with incremental compile
@@ -173,27 +104,12 @@ testCleanCompile()
   assertCaptured "SBT tasks to run should still be outputed" "Running: sbt clean compile stage"
 }
 
-testRemovePlayForkRun()
-{
-  createPlayProject "2.3.10" "0.13.17" "2.10.7"
-  mkdir -p ${BUILD_DIR}/project
-  touch ${BUILD_DIR}/project/play-fork-run.sbt
-
-  compile
-
-  assertEquals 0 "${RETURN}"
-  #assertCaptured "Warns about play-fork-run removal" "Removing project/play-fork-run.sbt."
-  assertFalse "Removes play-fork-run" "[ -f ${BUILD_DIR}/project/play-fork-run.sbt ]"
-}
-
 testCompile_Play20Project() {
   createSbtProject
   mkdir -p ${BUILD_DIR}/conf
   touch ${BUILD_DIR}/conf/application.conf
   compile
   assertEquals 0 "${RETURN}"
-  assertTrue  "Ivy2 cache should have been repacked for a play project." "[ -d ${CACHE_DIR}/.sbt_home/.ivy2 ]"
-  assertFalse "Ivy2 cache should not have been included in slug for a play project." "[ -d ${BUILD_DIR}/.sbt_home/.ivy2 ]"
   assertFalse "Streams should not have been included in slug for a play project." "[ -d ${BUILD_DIR}/target/streams ]"
   assertFalse "Scala cache should not have been included in slug for a play project." "[ -d ${BUILD_DIR}/target/scala-2.9.1 ]"
 }
diff --git a/test/spec/fixtures/repos/play-2.2.x-scala-sample/system.properties b/test/spec/fixtures/repos/play-2.2.x-scala-sample/system.properties
new file mode 100644
index 0000000..221ae01
--- /dev/null
+++ b/test/spec/fixtures/repos/play-2.2.x-scala-sample/system.properties
@@ -0,0 +1 @@
+java.runtime.version=8
diff --git a/test/spec/fixtures/repos/play-2.3.x-scala-sample/system.properties b/test/spec/fixtures/repos/play-2.3.x-scala-sample/system.properties
new file mode 100644
index 0000000..221ae01
--- /dev/null
+++ b/test/spec/fixtures/repos/play-2.3.x-scala-sample/system.properties
@@ -0,0 +1 @@
+java.runtime.version=8
diff --git a/test/spec/fixtures/repos/play-2.4.x-scala/system.properties b/test/spec/fixtures/repos/play-2.4.x-scala/system.properties
new file mode 100644
index 0000000..221ae01
--- /dev/null
+++ b/test/spec/fixtures/repos/play-2.4.x-scala/system.properties
@@ -0,0 +1 @@
+java.runtime.version=8
diff --git a/test/spec/fixtures/repos/sbt-minimal-scala-sample/system.properties b/test/spec/fixtures/repos/sbt-minimal-scala-sample/system.properties
index 97270b4..221ae01 100644
--- a/test/spec/fixtures/repos/sbt-minimal-scala-sample/system.properties
+++ b/test/spec/fixtures/repos/sbt-minimal-scala-sample/system.properties
@@ -1 +1 @@
-java.runtime.version=1.7
+java.runtime.version=8
diff --git a/test/spec/fixtures/repos/sbt-one-example/system.properties b/test/spec/fixtures/repos/sbt-one-example/system.properties
new file mode 100644
index 0000000..221ae01
--- /dev/null
+++ b/test/spec/fixtures/repos/sbt-one-example/system.properties
@@ -0,0 +1 @@
+java.runtime.version=8
diff --git a/test/spec/fixtures/repos/sbt-start-script-sample/system.properties b/test/spec/fixtures/repos/sbt-start-script-sample/system.properties
new file mode 100644
index 0000000..221ae01
--- /dev/null
+++ b/test/spec/fixtures/repos/sbt-start-script-sample/system.properties
@@ -0,0 +1 @@
+java.runtime.version=8