diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8cd24bc..190c662 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -34,8 +34,8 @@ jobs:
         ddev_version: [stable, HEAD]
         # The "release" tests only run on schedule and workflow_dispatch.
         bats_tag: ${{ (github.event_name == 'schedule' || github.event_name == 'workflow_dispatch')
-          && fromJSON('["php82-php83", "php84", "php85", "release"]')
-          || fromJSON('["php82-php83", "php84", "php85"]') }}
+          && fromJSON('["php82-php83", "php84", "php85", "php86", "release"]')
+          || fromJSON('["php82-php83", "php84", "php85", "php86"]') }}
       fail-fast: false
 
     runs-on: ${{ matrix.os }}
diff --git a/install.yaml b/install.yaml
index 7e5e40e..161a4d9 100644
--- a/install.yaml
+++ b/install.yaml
@@ -57,4 +57,14 @@ pre_install_actions:
       exit 2
     fi
 
+post_install_actions:
+  - |
+    #ddev-description:Removing PHP extensions not available for PHP 8.6
+    # TODO: Remove when memcached and redis are available for PHP 8.6
+    config_file="${DDEV_APPROOT}/.ddev/config.frankenphp.yaml"
+    if [ "${DDEV_PHP_VERSION}" = "8.6" ] && grep -q '#ddev-generated' "${config_file}"; then
+      sed -i.bak '/php-zts-memcached/d; /php-zts-redis/d' "${config_file}"
+      rm -f "${config_file}.bak"
+    fi
+
 ddev_version_constraint: '>= v1.24.10'
diff --git a/tests/test.bats b/tests/test.bats
index 02be80e..ebb505f 100644
--- a/tests/test.bats
+++ b/tests/test.bats
@@ -246,10 +246,17 @@ health_checks() {
     extensions+=(example_pie_extension)
   fi
 
+  local excluded_extensions=()
+  # TODO: Remove when these extensions work with PHP 8.6
+  if [[ "${php_version}" == "8.6" ]]; then
+    excluded_extensions=(memcached redis blackfire)
+  fi
+
   run ddev php -m
   assert_success
   refute_php_warnings
   for extension in "${extensions[@]}"; do
+    [[ " ${excluded_extensions[*]} " == *" ${extension} "* ]] && continue
     assert_line "${extension}"
   done
   if [[ "${FRANKENPHP_CUSTOM_EXTENSION}" != "true" ]]; then
@@ -259,11 +266,13 @@ health_checks() {
   run curl -sf https://${PROJNAME}.ddev.site/server-info.php
   assert_success
   for extension in "${extensions[@]}"; do
+    [[ " ${excluded_extensions[*]} " == *" ${extension} "* ]] && continue
     assert_line "extension=${extension}"
   done
 
   # The extensions must be enabled both in the CLI and in FrankenPHP
   for extension in xdebug xhprof blackfire; do
+    [[ " ${excluded_extensions[*]} " == *" ${extension} "* ]] && continue
     run ddev "${extension}" on
     assert_success
 
@@ -384,6 +393,18 @@ teardown() {
   install_from_directory 8.5
 }
 
+# bats test_tags=php86
+@test "install from directory PHP 8.6" {
+  set -eu -o pipefail
+
+  # TODO: Remove after the next DDEV release
+  if [[ "$(ddev --version)" == "ddev version v1.25.4" ]]; then
+    skip "PHP 8.6 is not supported in DDEV v1.25.4"
+  fi
+
+  install_from_directory 8.6
+}
+
 # bats test_tags=release
 @test "install from release" {
   set -eu -o pipefail
diff --git a/web-build/pre.Dockerfile.frankenphp b/web-build/pre.Dockerfile.frankenphp
index 8426631..bcf51ba 100644
--- a/web-build/pre.Dockerfile.frankenphp
+++ b/web-build/pre.Dockerfile.frankenphp
@@ -1,3 +1,16 @@
 #ddev-generated
 # Add PHP ZTS repository https://debs.henderkes.com/
-RUN curl -fsSL https://files.henderkes.com/install.sh | sh -s "${DDEV_PHP_VERSION}"
+RUN <<EOF
+set -eu -o pipefail
+
+PHP_ZTS_VERSION="${DDEV_PHP_VERSION//./}"
+mkdir -p /etc/apt/keyrings
+curl -fsSL "https://pkg.henderkes.com/api/packages/${PHP_ZTS_VERSION}/debian/repository.key" -o /etc/apt/keyrings/php-zts.asc
+cat > /etc/apt/sources.list.d/php-zts.sources <<SOURCES
+Types: deb
+URIs: https://pkg.henderkes.com/api/packages/${PHP_ZTS_VERSION}/debian
+Suites: php-zts
+Components: main
+Signed-By: /etc/apt/keyrings/php-zts.asc
+SOURCES
+EOF