diff --git a/.evergreen/config.yml b/.evergreen/config.yml
index 2843ac813..aede36c7e 100644
--- a/.evergreen/config.yml
+++ b/.evergreen/config.yml
@@ -72,3 +72,5 @@ include:
   - filename: .evergreen/config/generated/test/csfle.yml
   - filename: .evergreen/config/generated/test-variant/modern-php-full.yml
   - filename: .evergreen/config/generated/test-variant/legacy-php-full.yml
+  - filename: .evergreen/config/generated/test-variant/phpc.yml
+  - filename: .evergreen/config/generated/test-variant/lowest.yml
diff --git a/.evergreen/config/generate-config.php b/.evergreen/config/generate-config.php
index a87d262f7..b87051571 100644
--- a/.evergreen/config/generate-config.php
+++ b/.evergreen/config/generate-config.php
@@ -61,9 +61,8 @@
 // Test variants
 $allFiles[] = generateConfigs('buildvariants', 'test-variant', 'phpVersion', 'modern-php-full.yml', $modernPhpVersions);
 $allFiles[] = generateConfigs('buildvariants', 'test-variant', 'phpVersion', 'legacy-php-full.yml', $legacyPhpVersions);
-// TODO: Re-enable when 1.20.0 is released
-// $allFiles[] = generateConfigs('buildvariants', 'test-variant', 'phpVersion', 'phpc.yml', [$latestPhpVersion]);
-// $allFiles[] = generateConfigs('buildvariants', 'test-variant', 'phpVersion', 'lowest.yml', [$lowestPhpVersion]);
+$allFiles[] = generateConfigs('buildvariants', 'test-variant', 'phpVersion', 'phpc.yml', [$latestPhpVersion]);
+$allFiles[] = generateConfigs('buildvariants', 'test-variant', 'phpVersion', 'lowest.yml', [$lowestPhpVersion]);
 
 echo "Generated config. Use the following list to import files:\n";
 echo implode("\n", array_map('getImportConfig', $allFiles)) . "\n";
diff --git a/.evergreen/config/generated/build/build-extension.yml b/.evergreen/config/generated/build/build-extension.yml
index 4faf2d114..54c2b2a2a 100644
--- a/.evergreen/config/generated/build/build-extension.yml
+++ b/.evergreen/config/generated/build/build-extension.yml
@@ -7,41 +7,37 @@ tasks:
         vars:
           PHP_VERSION: "8.3"
       - func: "compile extension"
-        # TODO: remove once 1.20.0 is released
+      - func: "upload extension"
+  - name: "build-php-8.3-lowest"
+    tags: ["build", "php8.3", "lowest", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.3"
+      - func: "compile extension"
+        vars:
+          EXTENSION_VERSION: "1.20.0"
+      - func: "upload extension"
+  - name: "build-php-8.3-next-stable"
+    tags: ["build", "php8.3", "next-stable", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.3"
+      - func: "compile extension"
         vars:
           EXTENSION_BRANCH: "v1.20"
       - func: "upload extension"
-  # TODO: re-enable once 1.20.0 is released
-#  - name: "build-php-8.3-lowest"
-#    tags: ["build", "php8.3", "lowest", "pr", "tag"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "8.3"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_VERSION: "1.20.0"
-#      - func: "upload extension"
-#  - name: "build-php-8.3-next-stable"
-#    tags: ["build", "php8.3", "next-stable", "pr", "tag"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "8.3"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_BRANCH: "v1.20.0"
-#      - func: "upload extension"
-#  - name: "build-php-8.3-next-minor"
-#    tags: ["build", "php8.3", "next-minor"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "8.3"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_BRANCH: "master"
-#      - func: "upload extension"
+  - name: "build-php-8.3-next-minor"
+    tags: ["build", "php8.3", "next-minor"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.3"
+      - func: "compile extension"
+        vars:
+          EXTENSION_BRANCH: "v1.x"
+      - func: "upload extension"
   - name: "build-php-8.2"
     tags: ["build", "php8.2", "stable", "pr", "tag"]
     commands:
@@ -49,41 +45,37 @@ tasks:
         vars:
           PHP_VERSION: "8.2"
       - func: "compile extension"
-        # TODO: remove once 1.20.0 is released
+      - func: "upload extension"
+  - name: "build-php-8.2-lowest"
+    tags: ["build", "php8.2", "lowest", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.2"
+      - func: "compile extension"
+        vars:
+          EXTENSION_VERSION: "1.20.0"
+      - func: "upload extension"
+  - name: "build-php-8.2-next-stable"
+    tags: ["build", "php8.2", "next-stable", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.2"
+      - func: "compile extension"
         vars:
           EXTENSION_BRANCH: "v1.20"
       - func: "upload extension"
-  # TODO: re-enable once 1.20.0 is released
-#  - name: "build-php-8.2-lowest"
-#    tags: ["build", "php8.2", "lowest", "pr", "tag"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "8.2"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_VERSION: "1.20.0"
-#      - func: "upload extension"
-#  - name: "build-php-8.2-next-stable"
-#    tags: ["build", "php8.2", "next-stable", "pr", "tag"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "8.2"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_BRANCH: "v1.20.0"
-#      - func: "upload extension"
-#  - name: "build-php-8.2-next-minor"
-#    tags: ["build", "php8.2", "next-minor"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "8.2"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_BRANCH: "master"
-#      - func: "upload extension"
+  - name: "build-php-8.2-next-minor"
+    tags: ["build", "php8.2", "next-minor"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.2"
+      - func: "compile extension"
+        vars:
+          EXTENSION_BRANCH: "v1.x"
+      - func: "upload extension"
   - name: "build-php-8.1"
     tags: ["build", "php8.1", "stable", "pr", "tag"]
     commands:
@@ -91,41 +83,37 @@ tasks:
         vars:
           PHP_VERSION: "8.1"
       - func: "compile extension"
-        # TODO: remove once 1.20.0 is released
+      - func: "upload extension"
+  - name: "build-php-8.1-lowest"
+    tags: ["build", "php8.1", "lowest", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.1"
+      - func: "compile extension"
+        vars:
+          EXTENSION_VERSION: "1.20.0"
+      - func: "upload extension"
+  - name: "build-php-8.1-next-stable"
+    tags: ["build", "php8.1", "next-stable", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.1"
+      - func: "compile extension"
         vars:
           EXTENSION_BRANCH: "v1.20"
       - func: "upload extension"
-  # TODO: re-enable once 1.20.0 is released
-#  - name: "build-php-8.1-lowest"
-#    tags: ["build", "php8.1", "lowest", "pr", "tag"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "8.1"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_VERSION: "1.20.0"
-#      - func: "upload extension"
-#  - name: "build-php-8.1-next-stable"
-#    tags: ["build", "php8.1", "next-stable", "pr", "tag"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "8.1"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_BRANCH: "v1.20.0"
-#      - func: "upload extension"
-#  - name: "build-php-8.1-next-minor"
-#    tags: ["build", "php8.1", "next-minor"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "8.1"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_BRANCH: "master"
-#      - func: "upload extension"
+  - name: "build-php-8.1-next-minor"
+    tags: ["build", "php8.1", "next-minor"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.1"
+      - func: "compile extension"
+        vars:
+          EXTENSION_BRANCH: "v1.x"
+      - func: "upload extension"
   - name: "build-php-8.0"
     tags: ["build", "php8.0", "stable", "pr", "tag"]
     commands:
@@ -133,41 +121,37 @@ tasks:
         vars:
           PHP_VERSION: "8.0"
       - func: "compile extension"
-        # TODO: remove once 1.20.0 is released
+      - func: "upload extension"
+  - name: "build-php-8.0-lowest"
+    tags: ["build", "php8.0", "lowest", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.0"
+      - func: "compile extension"
+        vars:
+          EXTENSION_VERSION: "1.20.0"
+      - func: "upload extension"
+  - name: "build-php-8.0-next-stable"
+    tags: ["build", "php8.0", "next-stable", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.0"
+      - func: "compile extension"
         vars:
           EXTENSION_BRANCH: "v1.20"
       - func: "upload extension"
-  # TODO: re-enable once 1.20.0 is released
-#  - name: "build-php-8.0-lowest"
-#    tags: ["build", "php8.0", "lowest", "pr", "tag"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "8.0"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_VERSION: "1.20.0"
-#      - func: "upload extension"
-#  - name: "build-php-8.0-next-stable"
-#    tags: ["build", "php8.0", "next-stable", "pr", "tag"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "8.0"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_BRANCH: "v1.20.0"
-#      - func: "upload extension"
-#  - name: "build-php-8.0-next-minor"
-#    tags: ["build", "php8.0", "next-minor"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "8.0"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_BRANCH: "master"
-#      - func: "upload extension"
+  - name: "build-php-8.0-next-minor"
+    tags: ["build", "php8.0", "next-minor"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.0"
+      - func: "compile extension"
+        vars:
+          EXTENSION_BRANCH: "v1.x"
+      - func: "upload extension"
   - name: "build-php-7.4"
     tags: ["build", "php7.4", "stable", "pr", "tag"]
     commands:
@@ -175,38 +159,34 @@ tasks:
         vars:
           PHP_VERSION: "7.4"
       - func: "compile extension"
-        # TODO: remove once 1.20.0 is released
+      - func: "upload extension"
+  - name: "build-php-7.4-lowest"
+    tags: ["build", "php7.4", "lowest", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "7.4"
+      - func: "compile extension"
+        vars:
+          EXTENSION_VERSION: "1.20.0"
+      - func: "upload extension"
+  - name: "build-php-7.4-next-stable"
+    tags: ["build", "php7.4", "next-stable", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "7.4"
+      - func: "compile extension"
         vars:
           EXTENSION_BRANCH: "v1.20"
       - func: "upload extension"
-  # TODO: re-enable once 1.20.0 is released
-#  - name: "build-php-7.4-lowest"
-#    tags: ["build", "php7.4", "lowest", "pr", "tag"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "7.4"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_VERSION: "1.20.0"
-#      - func: "upload extension"
-#  - name: "build-php-7.4-next-stable"
-#    tags: ["build", "php7.4", "next-stable", "pr", "tag"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "7.4"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_BRANCH: "v1.20.0"
-#      - func: "upload extension"
-#  - name: "build-php-7.4-next-minor"
-#    tags: ["build", "php7.4", "next-minor"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "7.4"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_BRANCH: "master"
-#      - func: "upload extension"
+  - name: "build-php-7.4-next-minor"
+    tags: ["build", "php7.4", "next-minor"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "7.4"
+      - func: "compile extension"
+        vars:
+          EXTENSION_BRANCH: "v1.x"
+      - func: "upload extension"
diff --git a/.evergreen/config/generated/test-variant/lowest.yml b/.evergreen/config/generated/test-variant/lowest.yml
new file mode 100644
index 000000000..6ed188430
--- /dev/null
+++ b/.evergreen/config/generated/test-variant/lowest.yml
@@ -0,0 +1,16 @@
+# This file is generated automatically - please edit the "templates/test-variant/lowest.yml" template file instead.
+buildvariants:
+  - name: test-debian92-php-7.4-local-lowest
+    tags: ["test", "debian", "x64", "php7.4", "pr", "tag"]
+    display_name: "Test: Debian 9.2, PHP 7.4, Lowest Dependencies"
+    run_on: debian92-small
+    expansions:
+      FETCH_BUILD_VARIANT: "build-debian92"
+      FETCH_BUILD_TASK: "build-php-7.4-lowest"
+      PHP_VERSION: "7.4"
+      DEPENDENCIES: "lowest"
+    depends_on:
+      - variant: "build-debian92"
+        name: "build-php-7.4-lowest"
+    tasks:
+      - ".replicaset .local .4.0 !.csfle"
diff --git a/.evergreen/config/generated/test-variant/phpc.yml b/.evergreen/config/generated/test-variant/phpc.yml
new file mode 100644
index 000000000..e0eb428ce
--- /dev/null
+++ b/.evergreen/config/generated/test-variant/phpc.yml
@@ -0,0 +1,42 @@
+# This file is generated automatically - please edit the "templates/test-variant/phpc.yml" template file instead.
+buildvariants:
+  # Variants with different PHPC versions
+  - name: test-debian12-php-8.3-phpc-next-stable
+    tags: ["test", "debian", "x64", "php8.3", "pr", "tag"]
+    display_name: "Test: Debian 12, PHP 8.3, PHPC next-stable"
+    run_on: debian12-small
+    expansions:
+      FETCH_BUILD_VARIANT: "build-debian12"
+      FETCH_BUILD_TASK: "build-php-8.3-next-stable"
+      PHP_VERSION: "8.3"
+    depends_on:
+      - variant: "build-debian12"
+        name: "build-php-8.3-next-stable"
+    tasks:
+      - ".standalone .local !.csfle !.4.0 !.4.2 !.4.4 !.5.0 !.6.0"
+      - ".replicaset .local !.csfle !.4.0 !.4.2 !.4.4 !.5.0 !.6.0"
+      - ".sharded .local !.csfle !.4.0 !.4.2 !.4.4 !.5.0 !.6.0"
+      - ".loadbalanced .local !.csfle !.4.0 !.4.2 !.4.4 !.5.0 !.6.0"
+      - "test_serverless_task_group"
+      - "test_serverless_proxy_task_group"
+      - "test-atlas-data-lake"
+
+  - name: test-debian12-php-8.3-phpc-next-minor
+    tags: ["test", "debian", "x64", "php8.3"]
+    display_name: "Test: Debian 12, PHP 8.3, PHPC next-minor"
+    run_on: debian12-small
+    expansions:
+      FETCH_BUILD_VARIANT: "build-debian12"
+      FETCH_BUILD_TASK: "build-php-8.3-next-minor"
+      PHP_VERSION: "8.3"
+    depends_on:
+      - variant: "build-debian12"
+        name: "build-php-8.3-next-minor"
+    tasks:
+      - ".standalone .local !.csfle !.4.0 !.4.2 !.4.4 !.5.0 !.6.0"
+      - ".replicaset .local !.csfle !.4.0 !.4.2 !.4.4 !.5.0 !.6.0"
+      - ".sharded .local !.csfle !.4.0 !.4.2 !.4.4 !.5.0 !.6.0"
+      - ".loadbalanced .local !.csfle !.4.0 !.4.2 !.4.4 !.5.0 !.6.0"
+      - "test_serverless_task_group"
+      - "test_serverless_proxy_task_group"
+      - "test-atlas-data-lake"
diff --git a/.evergreen/config/templates/build/build-extension.yml b/.evergreen/config/templates/build/build-extension.yml
index ecd1fffdd..869c0a9e4 100644
--- a/.evergreen/config/templates/build/build-extension.yml
+++ b/.evergreen/config/templates/build/build-extension.yml
@@ -5,38 +5,34 @@
         vars:
           PHP_VERSION: "%phpVersion%"
       - func: "compile extension"
-        # TODO: remove once 1.20.0 is released
+      - func: "upload extension"
+  - name: "build-php-%phpVersion%-lowest"
+    tags: ["build", "php%phpVersion%", "lowest", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "%phpVersion%"
+      - func: "compile extension"
+        vars:
+          EXTENSION_VERSION: "1.20.0"
+      - func: "upload extension"
+  - name: "build-php-%phpVersion%-next-stable"
+    tags: ["build", "php%phpVersion%", "next-stable", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "%phpVersion%"
+      - func: "compile extension"
         vars:
           EXTENSION_BRANCH: "v1.20"
       - func: "upload extension"
-  # TODO: re-enable once 1.20.0 is released
-#  - name: "build-php-%phpVersion%-lowest"
-#    tags: ["build", "php%phpVersion%", "lowest", "pr", "tag"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "%phpVersion%"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_VERSION: "1.20.0"
-#      - func: "upload extension"
-#  - name: "build-php-%phpVersion%-next-stable"
-#    tags: ["build", "php%phpVersion%", "next-stable", "pr", "tag"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "%phpVersion%"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_BRANCH: "v1.20.0"
-#      - func: "upload extension"
-#  - name: "build-php-%phpVersion%-next-minor"
-#    tags: ["build", "php%phpVersion%", "next-minor"]
-#    commands:
-#      - func: "locate PHP binaries"
-#        vars:
-#          PHP_VERSION: "%phpVersion%"
-#      - func: "compile extension"
-#        vars:
-#          EXTENSION_BRANCH: "master"
-#      - func: "upload extension"
+  - name: "build-php-%phpVersion%-next-minor"
+    tags: ["build", "php%phpVersion%", "next-minor"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "%phpVersion%"
+      - func: "compile extension"
+        vars:
+          EXTENSION_BRANCH: "v1.x"
+      - func: "upload extension"
diff --git a/.github/workflows/coding-standards.yml b/.github/workflows/coding-standards.yml
index 959e9b500..9fe30fbb0 100644
--- a/.github/workflows/coding-standards.yml
+++ b/.github/workflows/coding-standards.yml
@@ -15,9 +15,7 @@ on:
 
 env:
   PHP_VERSION: "8.2"
-  # TODO: change to "stable" once 1.20.0 is released
-  # DRIVER_VERSION: "stable"
-  DRIVER_VERSION: "mongodb/mongo-php-driver@v1.20"
+  DRIVER_VERSION: "stable"
 
 jobs:
   phpcs:
diff --git a/.github/workflows/static-analysis.yml b/.github/workflows/static-analysis.yml
index 23bdd702e..7a634683b 100644
--- a/.github/workflows/static-analysis.yml
+++ b/.github/workflows/static-analysis.yml
@@ -21,9 +21,7 @@ on:
 
 env:
   PHP_VERSION: "8.2"
-  # TODO: change to "stable" once 1.20.0 is released
-  # DRIVER_VERSION: "stable"
-  DRIVER_VERSION: "mongodb/mongo-php-driver@v1.20"
+  DRIVER_VERSION: "stable"
 
 jobs:
   psalm:
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index e5ae92cdc..2ac3b72e4 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,9 +14,7 @@ on:
       - "feature/*"
 
 env:
-  # TODO: change to "stable" once 1.20.0 is released
-  # DRIVER_VERSION: "stable"
-  DRIVER_VERSION: "mongodb/mongo-php-driver@v1.20"
+  DRIVER_VERSION: "stable"
 
 jobs:
   phpunit: