diff --git a/.bazelci/presubmit.yml b/.bazelci/presubmit.yml
index 5d454ff9b..7fc23ca60 100644
--- a/.bazelci/presubmit.yml
+++ b/.bazelci/presubmit.yml
@@ -48,90 +48,14 @@ x_defaults:
       - "//tools/..."
 
 tasks:
-  macos_7:
-    name: "Previous LTS with no bzlmod"
-    bazel: 7.x
-    build_flags:
-      - "--noenable_bzlmod"
-      - "--enable_workspace"
-    <<: *mac_common
-
-  macos_latest:
-    name: "Current LTS"
-    bazel: latest
-    <<: *mac_common
-
-  macos_last_green:
-    name: "Last Green Bazel"
-    bazel: last_green
-    <<: *mac_common
-
-  macos_latest_head_deps:
-    name: "Current LTS with Head Deps"
-    bazel: latest
-    shell_commands:
-    # Update the WORKSPACE to use head versions of some deps to ensure nothing
-    # has landed on them breaking this project.
-    - .bazelci/update_workspace_to_deps_heads.sh
-    <<: *mac_common
-
-  ubuntu2004_7:
-    name: "Previous LTS with no bzlmod"
-    bazel: 7.x
-    shell_commands:
-      - "echo --- Downloading and extracting Swift $SWIFT_VERSION to $SWIFT_HOME"
-      - "mkdir $SWIFT_HOME"
-      - "curl https://download.swift.org/swift-${SWIFT_VERSION}-release/ubuntu2004/swift-${SWIFT_VERSION}-RELEASE/swift-${SWIFT_VERSION}-RELEASE-ubuntu20.04.tar.gz | tar xvz --strip-components=1 -C $SWIFT_HOME"
-    build_flags:
-      - "--noenable_bzlmod"
-      - "--enable_workspace"
-    <<: *linux_common
-
-  ubuntu2004_latest:
-    name: "Current LTS"
-    bazel: latest
-    shell_commands:
-      - "echo --- Downloading and extracting Swift $SWIFT_VERSION to $SWIFT_HOME"
-      - "mkdir $SWIFT_HOME"
-      - "curl https://download.swift.org/swift-${SWIFT_VERSION}-release/ubuntu2004/swift-${SWIFT_VERSION}-RELEASE/swift-${SWIFT_VERSION}-RELEASE-ubuntu20.04.tar.gz | tar xvz --strip-components=1 -C $SWIFT_HOME"
-    <<: *linux_common
-
   ubuntu2004_last_green:
     name: "Last Green Bazel"
-    bazel: last_green
-    shell_commands:
-      - "echo --- Downloading and extracting Swift $SWIFT_VERSION to $SWIFT_HOME"
-      - "mkdir $SWIFT_HOME"
-      - "curl https://download.swift.org/swift-${SWIFT_VERSION}-release/ubuntu2004/swift-${SWIFT_VERSION}-RELEASE/swift-${SWIFT_VERSION}-RELEASE-ubuntu20.04.tar.gz | tar xvz --strip-components=1 -C $SWIFT_HOME"
-    <<: *linux_common
-
-  ubuntu2004_latest_head_deps:
-    name: "Current LTS with Head Deps"
-    bazel: latest
+    # DNM: Bisecting Bazel hang
+    bazel: 0522f8e58bf864005207eb8f09162d35ddd1f678
     shell_commands:
       - "echo --- Downloading and extracting Swift $SWIFT_VERSION to $SWIFT_HOME"
       - "mkdir $SWIFT_HOME"
       - "curl https://download.swift.org/swift-${SWIFT_VERSION}-release/ubuntu2004/swift-${SWIFT_VERSION}-RELEASE/swift-${SWIFT_VERSION}-RELEASE-ubuntu20.04.tar.gz | tar xvz --strip-components=1 -C $SWIFT_HOME"
-      # Update the WORKSPACE to use head versions of some deps to ensure nothing
-      # has landed on them breaking this project.
-      - .bazelci/update_workspace_to_deps_heads.sh
     <<: *linux_common
 
-  # TODO: re-enable when Windows in Bazel CI is properly configured for Swift.
-  # windows_last_green:
-  #   name: "Last Green Bazel"
-  #   bazel: last_green
-  #   <<: *windows_common
-
-  doc_tests:
-    name: "Doc tests"
-    bazel: latest
-    <<: *linux_environment
-    shell_commands:
-      - "echo --- Downloading and extracting Swift $SWIFT_VERSION to $SWIFT_HOME"
-      - "mkdir $SWIFT_HOME"
-      - "curl https://download.swift.org/swift-${SWIFT_VERSION}-release/ubuntu2004/swift-${SWIFT_VERSION}-RELEASE/swift-${SWIFT_VERSION}-RELEASE-ubuntu20.04.tar.gz | tar xvz --strip-components=1 -C $SWIFT_HOME"
-    test_targets:
-    - "doc/..."
-
 buildifier: 8.2.1