diff --git a/kokoro/macos/php7.0_mac/build.sh b/kokoro/macos/php7.0_mac/build.sh
deleted file mode 100755
index c6717e071b..0000000000
--- a/kokoro/macos/php7.0_mac/build.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/bash
-#
-# Build file to set up and run tests
-
-# Change to repo root
-cd $(dirname $0)/../../..
-
-# Prepare worker environment to run tests
-source kokoro/macos/prepare_build_macos_rc
-
-# TODO(mkruskal) Re-enable this once we can get a working PHP 7.0 installed.
-#./tests.sh php7.0_mac
diff --git a/kokoro/macos/php7.3_mac/build.sh b/kokoro/macos/php7.3_mac/build.sh
deleted file mode 100755
index 2688ddbf65..0000000000
--- a/kokoro/macos/php7.3_mac/build.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/bash
-#
-# Build file to set up and run tests
-
-# Change to repo root
-cd $(dirname $0)/../../..
-
-# Prepare worker environment to run tests
-source kokoro/macos/prepare_build_macos_rc
-
-# TODO(mkruskal) Re-enable this once we can get a working PHP 7.0 installed.
-#./tests.sh php7.3_mac
diff --git a/kokoro/macos/php74/build.sh b/kokoro/macos/php74/build.sh
new file mode 100755
index 0000000000..ff3965756c
--- /dev/null
+++ b/kokoro/macos/php74/build.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+#
+# Build file to set up and run tests
+
+# Change to repo root
+cd $(dirname $0)/../../..
+
+# Prepare worker environment to run tests
+source kokoro/macos/prepare_build_macos_rc
+
+# Install Dependencies
+brew install coreutils php@7.4
+
+# Configure path
+PHP_FOLDER=$(find $HOMEBREW_PREFIX -type d -regex ".*php.*/7.4.[0-9]*")
+test ! -z "$PHP_FOLDER"
+export PATH="$PHP_FOLDER/bin:$PATH"
+
+# Test
+./tests.sh php_mac
diff --git a/kokoro/macos/php7.3_mac/continuous.cfg b/kokoro/macos/php74/continuous.cfg
similarity index 65%
rename from kokoro/macos/php7.3_mac/continuous.cfg
rename to kokoro/macos/php74/continuous.cfg
index 9a717451d3..cf7e80beb8 100644
--- a/kokoro/macos/php7.3_mac/continuous.cfg
+++ b/kokoro/macos/php74/continuous.cfg
@@ -1,5 +1,5 @@
 # Config file for running tests in Kokoro
 
 # Location of the build script in repository
-build_file: "protobuf/kokoro/macos/php7.3_mac/build.sh"
+build_file: "protobuf/kokoro/macos/php74/build.sh"
 timeout_mins: 1440
diff --git a/kokoro/macos/php7.0_mac/presubmit.cfg b/kokoro/macos/php74/presubmit.cfg
similarity index 65%
rename from kokoro/macos/php7.0_mac/presubmit.cfg
rename to kokoro/macos/php74/presubmit.cfg
index c2c1811920..cf7e80beb8 100644
--- a/kokoro/macos/php7.0_mac/presubmit.cfg
+++ b/kokoro/macos/php74/presubmit.cfg
@@ -1,5 +1,5 @@
 # Config file for running tests in Kokoro
 
 # Location of the build script in repository
-build_file: "protobuf/kokoro/macos/php7.0_mac/build.sh"
+build_file: "protobuf/kokoro/macos/php74/build.sh"
 timeout_mins: 1440
diff --git a/kokoro/macos/php80/build.sh b/kokoro/macos/php80/build.sh
new file mode 100755
index 0000000000..84e2c464ef
--- /dev/null
+++ b/kokoro/macos/php80/build.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+#
+# Build file to set up and run tests
+
+# Change to repo root
+cd $(dirname $0)/../../..
+
+# Prepare worker environment to run tests
+source kokoro/macos/prepare_build_macos_rc
+
+# Install Dependencies
+brew install coreutils php@8.0
+
+# Configure path
+PHP_FOLDER=$(find $HOMEBREW_PREFIX -type d -regex ".*php.*/8.0.[0-9]*")
+test ! -z "$PHP_FOLDER"
+export PATH="$PHP_FOLDER/bin:$PATH"
+
+# Test
+./tests.sh php_mac
diff --git a/kokoro/macos/php7.0_mac/continuous.cfg b/kokoro/macos/php80/continuous.cfg
similarity index 65%
rename from kokoro/macos/php7.0_mac/continuous.cfg
rename to kokoro/macos/php80/continuous.cfg
index c2c1811920..ded43e62c5 100644
--- a/kokoro/macos/php7.0_mac/continuous.cfg
+++ b/kokoro/macos/php80/continuous.cfg
@@ -1,5 +1,5 @@
 # Config file for running tests in Kokoro
 
 # Location of the build script in repository
-build_file: "protobuf/kokoro/macos/php7.0_mac/build.sh"
+build_file: "protobuf/kokoro/macos/php80/build.sh"
 timeout_mins: 1440
diff --git a/kokoro/macos/php7.3_mac/presubmit.cfg b/kokoro/macos/php80/presubmit.cfg
similarity index 65%
rename from kokoro/macos/php7.3_mac/presubmit.cfg
rename to kokoro/macos/php80/presubmit.cfg
index 9a717451d3..ded43e62c5 100644
--- a/kokoro/macos/php7.3_mac/presubmit.cfg
+++ b/kokoro/macos/php80/presubmit.cfg
@@ -1,5 +1,5 @@
 # Config file for running tests in Kokoro
 
 # Location of the build script in repository
-build_file: "protobuf/kokoro/macos/php7.3_mac/build.sh"
+build_file: "protobuf/kokoro/macos/php80/build.sh"
 timeout_mins: 1440
diff --git a/kokoro/macos/prepare_build_macos_rc b/kokoro/macos/prepare_build_macos_rc
index 8e0a87edbb..7ec2832b85 100755
--- a/kokoro/macos/prepare_build_macos_rc
+++ b/kokoro/macos/prepare_build_macos_rc
@@ -4,20 +4,16 @@
 
 set -eux
 
+export HOMEBREW_PREFIX=$(brew --prefix)
+
 ##
 # Select Xcode version
-
-# Remember to update the Xcode version when Xcode_11.3.app is not available.
-# If xcode is not available, it will probably encounter the failure for
-# "autom4te: need GNU m4 1.4 or later: /usr/bin/m4"
-# go/kokoro/userdocs/macos/selecting_xcode.md for more information.
-export DEVELOPER_DIR=/Applications/Xcode_11.3.app/Contents/Developer
+export DEVELOPER_DIR=/Applications/Xcode_13.3.1.app/Contents/Developer
+sudo xcode-select -s "${DEVELOPER_DIR}"
 
 ##
-# Select C/C++ compilers
-
-export CC=gcc
-export CXX=g++
+# Use Python 2 by default (for googletest)
+pyenv global 2.7.18
 
 ##
 # Install Tox
@@ -27,14 +23,18 @@ if [[ "${KOKORO_INSTALL_TOX:-}" == "yes" ]] ; then
 fi
 
 ##
-# Install RVM
-
+# Setup RVM
 if [[ "${KOKORO_INSTALL_RVM:-}" == "yes" ]] ; then
-  curl -sSL https://rvm.io/mpapis.asc | gpg --import -
-  curl -sSL https://rvm.io/pkuczynski.asc | gpg --import -
+    git config --global --add safe.directory $HOMEBREW_PREFIX/Library/Taps/homebrew/homebrew-cask
+    git config --global --add safe.directory $HOMEBREW_PREFIX/Library/Taps/homebrew/homebrew-core
+    git config --global --add safe.directory $HOMEBREW_PREFIX/Library/Taps/homebrew/homebrew-services
+    sudo chown -R $(whoami) $HOME/.rvm/
+fi
 
-  # Old OpenSSL versions cannot handle the SSL certificate used by
-  # https://get.rvm.io, so as a workaround we download RVM directly from
-  # GitHub. See this issue for details: https://github.com/rvm/rvm/issues/5133
-  curl -sSL https://raw.githubusercontent.com/rvm/rvm/master/binscripts/rvm-installer | bash -s master --ruby
+# "Install" valgrind if it doesn't exist
+##
+if [ ! -x "$(command -v valgrind)" ]; then
+    echo "#! /bin/bash" > valgrind
+    chmod ug+x valgrind
+    sudo mv valgrind /usr/local/bin/valgrind
 fi
diff --git a/kokoro/release/ruby/macos/build_artifacts.sh b/kokoro/release/ruby/macos/build_artifacts.sh
index c68b63cc43..a109d45b61 100755
--- a/kokoro/release/ruby/macos/build_artifacts.sh
+++ b/kokoro/release/ruby/macos/build_artifacts.sh
@@ -12,8 +12,5 @@ export ARTIFACT_DIR=$(pwd)/artifacts
 # ruby environment
 bash kokoro/release/ruby/macos/ruby/ruby_build_environment.sh
 
-gem install rubygems-update
-update_rubygems
-
 # build artifacts
 bash kokoro/release/ruby/macos/ruby/ruby_build.sh
diff --git a/kokoro/release/ruby/macos/ruby/ruby_build.sh b/kokoro/release/ruby/macos/ruby/ruby_build.sh
index 55773b21a9..bbfc631197 100755
--- a/kokoro/release/ruby/macos/ruby/ruby_build.sh
+++ b/kokoro/release/ruby/macos/ruby/ruby_build.sh
@@ -3,7 +3,6 @@
 set -ex
 
 # Build protoc
-use_bazel.sh 5.1.1
 bazel build //:protoc
 export PROTOC=$PWD/bazel-bin/protoc
 
diff --git a/kokoro/release/ruby/macos/ruby/ruby_build_environment.sh b/kokoro/release/ruby/macos/ruby/ruby_build_environment.sh
index 2a9cb1687b..ae973fce43 100755
--- a/kokoro/release/ruby/macos/ruby/ruby_build_environment.sh
+++ b/kokoro/release/ruby/macos/ruby/ruby_build_environment.sh
@@ -4,13 +4,9 @@ set -ex
 
 set +ex  # rvm script is very verbose and exits with errorcode
 
-curl -sSL https://rvm.io/mpapis.asc | gpg --import -
-curl -sSL https://rvm.io/pkuczynski.asc | gpg --import -
-
-# Old OpenSSL versions cannot handle the SSL certificate used by
-# https://get.rvm.io, so as a workaround we download RVM directly from
-# GitHub. See this issue for details: https://github.com/rvm/rvm/issues/5133
-curl -sSL https://raw.githubusercontent.com/rvm/rvm/master/binscripts/rvm-installer | bash -s master --ruby
+# Fix permissions
+sudo chown -R $(whoami) $HOME/.rvm/
+sudo chown -R $(whoami) /Library/Ruby/
 
 source $HOME/.rvm/scripts/rvm
 set -e  # rvm commands are very verbose
diff --git a/objectivec/GPBApi.pbobjc.h b/objectivec/GPBApi.pbobjc.h
index 871e90885a..1848aa6a91 100644
--- a/objectivec/GPBApi.pbobjc.h
+++ b/objectivec/GPBApi.pbobjc.h
@@ -74,12 +74,12 @@ GPB_FINAL @interface GPBApi : GPBMessage
 
 /** The methods of this interface, in unspecified order. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<GPBMethod*> *methodsArray;
-/** The number of items in @c methodsArray without causing the array to be created. */
+/** The number of items in @c methodsArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger methodsArray_Count;
 
 /** Any metadata attached to the interface. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<GPBOption*> *optionsArray;
-/** The number of items in @c optionsArray without causing the array to be created. */
+/** The number of items in @c optionsArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger optionsArray_Count;
 
 /**
@@ -115,7 +115,7 @@ GPB_FINAL @interface GPBApi : GPBMessage
 
 /** Included interfaces. See [Mixin][]. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<GPBMixin*> *mixinsArray;
-/** The number of items in @c mixinsArray without causing the array to be created. */
+/** The number of items in @c mixinsArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger mixinsArray_Count;
 
 /** The source syntax of the service. */
@@ -169,7 +169,7 @@ GPB_FINAL @interface GPBMethod : GPBMessage
 
 /** Any metadata attached to the method. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<GPBOption*> *optionsArray;
-/** The number of items in @c optionsArray without causing the array to be created. */
+/** The number of items in @c optionsArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger optionsArray_Count;
 
 /** The source syntax of this method. */
diff --git a/objectivec/GPBFieldMask.pbobjc.h b/objectivec/GPBFieldMask.pbobjc.h
index c4667b44db..b7eccff21c 100644
--- a/objectivec/GPBFieldMask.pbobjc.h
+++ b/objectivec/GPBFieldMask.pbobjc.h
@@ -247,7 +247,7 @@ GPB_FINAL @interface GPBFieldMask : GPBMessage
 
 /** The set of field mask paths. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<NSString*> *pathsArray;
-/** The number of items in @c pathsArray without causing the array to be created. */
+/** The number of items in @c pathsArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger pathsArray_Count;
 
 @end
diff --git a/objectivec/GPBStruct.pbobjc.h b/objectivec/GPBStruct.pbobjc.h
index dd6ab28f0e..ff4eefde52 100644
--- a/objectivec/GPBStruct.pbobjc.h
+++ b/objectivec/GPBStruct.pbobjc.h
@@ -87,7 +87,7 @@ GPB_FINAL @interface GPBStruct : GPBMessage
 
 /** Unordered map of dynamically typed values. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableDictionary<NSString*, GPBValue*> *fields;
-/** The number of items in @c fields without causing the array to be created. */
+/** The number of items in @c fields without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger fields_Count;
 
 @end
@@ -178,7 +178,7 @@ GPB_FINAL @interface GPBListValue : GPBMessage
 
 /** Repeated field of dynamically typed values. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<GPBValue*> *valuesArray;
-/** The number of items in @c valuesArray without causing the array to be created. */
+/** The number of items in @c valuesArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger valuesArray_Count;
 
 @end
diff --git a/objectivec/GPBType.pbobjc.h b/objectivec/GPBType.pbobjc.h
index b0230501cf..969219f03f 100644
--- a/objectivec/GPBType.pbobjc.h
+++ b/objectivec/GPBType.pbobjc.h
@@ -195,17 +195,17 @@ GPB_FINAL @interface GPBType : GPBMessage
 
 /** The list of fields. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<GPBField*> *fieldsArray;
-/** The number of items in @c fieldsArray without causing the array to be created. */
+/** The number of items in @c fieldsArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger fieldsArray_Count;
 
 /** The list of types appearing in `oneof` definitions in this type. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<NSString*> *oneofsArray;
-/** The number of items in @c oneofsArray without causing the array to be created. */
+/** The number of items in @c oneofsArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger oneofsArray_Count;
 
 /** The protocol buffer options. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<GPBOption*> *optionsArray;
-/** The number of items in @c optionsArray without causing the array to be created. */
+/** The number of items in @c optionsArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger optionsArray_Count;
 
 /** The source context. */
@@ -279,7 +279,7 @@ GPB_FINAL @interface GPBField : GPBMessage
 
 /** The protocol buffer options. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<GPBOption*> *optionsArray;
-/** The number of items in @c optionsArray without causing the array to be created. */
+/** The number of items in @c optionsArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger optionsArray_Count;
 
 /** The field JSON name. */
@@ -334,12 +334,12 @@ GPB_FINAL @interface GPBEnum : GPBMessage
 
 /** Enum value definitions. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<GPBEnumValue*> *enumvalueArray;
-/** The number of items in @c enumvalueArray without causing the array to be created. */
+/** The number of items in @c enumvalueArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger enumvalueArray_Count;
 
 /** Protocol buffer options. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<GPBOption*> *optionsArray;
-/** The number of items in @c optionsArray without causing the array to be created. */
+/** The number of items in @c optionsArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger optionsArray_Count;
 
 /** The source context. */
@@ -385,7 +385,7 @@ GPB_FINAL @interface GPBEnumValue : GPBMessage
 
 /** Protocol buffer options. */
 @property(nonatomic, readwrite, strong, null_resettable) NSMutableArray<GPBOption*> *optionsArray;
-/** The number of items in @c optionsArray without causing the array to be created. */
+/** The number of items in @c optionsArray without causing the container to be created. */
 @property(nonatomic, readonly) NSUInteger optionsArray_Count;
 
 @end
diff --git a/objectivec/generate_well_known_types.sh b/objectivec/generate_well_known_types.sh
index 1b9de6ec55..e6c9b044d1 100755
--- a/objectivec/generate_well_known_types.sh
+++ b/objectivec/generate_well_known_types.sh
@@ -73,6 +73,7 @@ for PROTO_FILE in "${RUNTIME_PROTO_FILES[@]}"; do
     if ! diff "${ObjCDir}/GPB${OBJC_NAME}${EXT}" "${TMP_DIR}/${DIR}/${OBJC_NAME}${EXT}" > /dev/null 2>&1 ; then
       if [[ "${CHECK_ONLY}" == 1 ]] ; then
         echo "ERROR: The WKTs need to be regenerated! Run $0"
+        diff -u "${ObjCDir}/GPB${OBJC_NAME}${EXT}" "${TMP_DIR}/${DIR}/${OBJC_NAME}${EXT}"
         exit 1
       fi
 
diff --git a/tests.sh b/tests.sh
index f2b481cc78..ecd7e12a12 100755
--- a/tests.sh
+++ b/tests.sh
@@ -490,47 +490,8 @@ build_php_c() {
   test_php_c
 }
 
-build_php7.0_mac() {
+build_php_mac() {
   internal_build_cpp
-  # Install PHP
-  curl -s https://php-osx.liip.ch/install.sh | bash -s 7.0
-  PHP_FOLDER=`find /usr/local -type d -name "php5-7.0*"`  # The folder name may change upon time
-  test ! -z "$PHP_FOLDER"
-  export PATH="$PHP_FOLDER/bin:$PATH"
-
-  # Install Composer
-  wget https://getcomposer.org/download/2.0.13/composer.phar --progress=dot:mega -O /usr/local/bin/composer
-  chmod a+x /usr/local/bin/composer
-
-  # Install valgrind
-  echo "#! /bin/bash" > valgrind
-  chmod ug+x valgrind
-  sudo mv valgrind /usr/local/bin/valgrind
-
-  # Test
-  test_php_c
-}
-
-build_php7.3_mac() {
-  internal_build_cpp
-  # Install PHP
-  # We can't test PHP 7.4 with these binaries yet:
-  #   https://github.com/liip/php-osx/issues/276
-  curl -s https://php-osx.liip.ch/install.sh | bash -s 7.3
-  PHP_FOLDER=`find /usr/local -type d -name "php5-7.3*"`  # The folder name may change upon time
-  test ! -z "$PHP_FOLDER"
-  export PATH="$PHP_FOLDER/bin:$PATH"
-
-  # Install Composer
-  wget https://getcomposer.org/download/2.0.13/composer.phar --progress=dot:mega -O /usr/local/bin/composer
-  chmod a+x /usr/local/bin/composer
-
-  # Install valgrind
-  echo "#! /bin/bash" > valgrind
-  chmod ug+x valgrind
-  sudo mv valgrind /usr/local/bin/valgrind
-
-  # Test
   test_php_c
 }