diff --git a/.github/workflows/regression-reusable-suite.yml b/.github/workflows/regression-reusable-suite.yml
index 233ec08d26d0f..51d064ea0f011 100644
--- a/.github/workflows/regression-reusable-suite.yml
+++ b/.github/workflows/regression-reusable-suite.yml
@@ -93,6 +93,7 @@ jobs:
       build_sha: ${{ inputs.build_sha }}
       pr_number: ${{ github.event.number }}
       artifacts: builds
+      regression_args: ${{ inputs.regression_args }}
       # Args
       args: --test-to-end
         --no-colors
diff --git a/.github/workflows/regression.yml b/.github/workflows/regression.yml
index 7d0935d60befe..ffcd7283f0808 100644
--- a/.github/workflows/regression.yml
+++ b/.github/workflows/regression.yml
@@ -126,7 +126,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        SUITE: [aes_encryption, atomic_insert, attach, base_58, clickhouse_keeper_failover,data_types, datetime64_extended_range, disk_level_encryption, dns, engines, example, extended_precision_data_types, functions, jwt_authentication, kafka, kerberos, key_value, lightweight_delete, memory, part_moves_between_shards, selects, session_timezone, settings, version, window_functions]
+        SUITE: [aes_encryption, atomic_insert, attach, base_58, clickhouse_keeper_failover,data_types, datetime64_extended_range, disk_level_encryption, dns, engines, example, extended_precision_data_types, functions, jwt_authentication, kafka, kerberos, key_value, memory, part_moves_between_shards, selects, session_timezone, settings, version, window_functions]
     uses: ./.github/workflows/regression-reusable-suite.yml
     with:
       ref: ${{ inputs.commit }}
@@ -143,6 +143,40 @@ jobs:
       job_name: ${{ matrix.SUITE }}
     secrets: inherit
 
+  LightweightDelete:
+    if: |
+      fromJson(inputs.workflow_config).workflow_config.custom_data.ci_regression_jobs[0] == null ||
+      contains(fromJson(inputs.workflow_config).workflow_config.custom_data.ci_regression_jobs, 'common')
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - PART: 1
+            FILTER: --only "/lightweight delete/disk space/*"
+          - PART: 2
+            FILTER: --only "/lightweight delete/hard restart/*"
+          - PART: 3
+            FILTER: --skip "/lightweight delete/disk space/*" "/lightweight delete/hard restart/*" "/lightweight delete/alter after delete/*" "/lightweight delete/concurrent alter and delete/*" "/lightweight delete/concurrent delete/*" "/lightweight delete/basic checks/*" "/lightweight delete/performance/*" "/lightweight delete/ontime tests/*"
+          - PART: 4
+            FILTER: --only "/lightweight delete/alter after delete/*" "/lightweight delete/concurrent alter and delete/*" "/lightweight delete/concurrent delete/*" "/lightweight delete/basic checks/*" "/lightweight delete/performance/*" "/lightweight delete/ontime tests/*"
+    uses: ./.github/workflows/regression-reusable-suite.yml
+    with:
+      ref: ${{ inputs.commit }}
+      workflow_config: ${{ inputs.workflow_config }}
+      suite_name: lightweight_delete
+      suite_executable: regression.py
+      output_format: new-fails
+      flags: --with-analyzer
+      timeout_minutes: 300
+      runner_arch: ${{ inputs.arch }}
+      runner_type: ${{ inputs.runner_type }}
+      part: ${{ matrix.PART }}
+      build_sha: ${{ inputs.build_sha }}
+      set_commit_status: true
+      job_name: lightweight_delete
+      extra_args: ${{ matrix.FILTER }}
+    secrets: inherit
+
   AggregateFunctions:
     if: |
       fromJson(inputs.workflow_config).workflow_config.custom_data.ci_regression_jobs[0] == null ||
@@ -181,6 +215,8 @@ jobs:
             PART: 1
           - ONLY: attach
             PART: 2
+          - ONLY: attach
+            PART: 3
     uses: ./.github/workflows/regression-reusable-suite.yml
     with:
       ref: ${{ inputs.commit }}
@@ -189,7 +225,7 @@ jobs:
       suite_executable: regression.py
       output_format: new-fails
       flags: --with-analyzer
-      timeout_minutes: ${{ inputs.timeout_minutes }}
+      timeout_minutes: 300
       runner_arch: ${{ inputs.arch }}
       runner_type: ${{ inputs.runner_type }}
       storage_path: /${{ matrix.ONLY }}_partition
@@ -534,10 +570,56 @@ jobs:
     secrets: inherit
 
   # CAS (content-addressed storage) is only available in Antalya builds >= 26.6.
-  # These jobs run the suites that support the `--cas` or `--cas-s3-cache` flag with
-  # a content-addressed disk as the default MergeTree storage. Gated on the Antalya
-  # version so they are never scheduled on upstream release builds where the `cas`
-  # metadata type does not exist.
+  # The dedicated `cas` suite, plus other suites run with `--cas` or `--cas-s3-cache`.
+  # Gated on the Antalya version so they are never scheduled on upstream release
+  # builds where the `cas` metadata type does not exist.
+  CASSuite:
+    if: |
+      contains(fromJson(inputs.workflow_config).workflow_config.custom_data.version.string, 'antalya') &&
+      (
+        fromJson(inputs.workflow_config).workflow_config.custom_data.ci_regression_jobs[0] == null ||
+        contains(fromJson(inputs.workflow_config).workflow_config.custom_data.ci_regression_jobs, 'cas')
+      )
+    uses: ./.github/workflows/regression-reusable-suite.yml
+    with:
+      ref: ${{ inputs.commit }}
+      workflow_config: ${{ inputs.workflow_config }}
+      suite_name: cas
+      suite_executable: regression.py
+      output_format: new-fails
+      flags: --with-analyzer
+      timeout_minutes: 180
+      runner_arch: ${{ inputs.arch }}
+      runner_type: ${{ inputs.runner_type }}
+      build_sha: ${{ inputs.build_sha }}
+      set_commit_status: true
+      job_name: cas
+    secrets: inherit
+
+  CASS3CacheSuite:
+    if: |
+      contains(fromJson(inputs.workflow_config).workflow_config.custom_data.version.string, 'antalya') &&
+      (
+        fromJson(inputs.workflow_config).workflow_config.custom_data.ci_regression_jobs[0] == null ||
+        contains(fromJson(inputs.workflow_config).workflow_config.custom_data.ci_regression_jobs, 'cas')
+      )
+    uses: ./.github/workflows/regression-reusable-suite.yml
+    with:
+      ref: ${{ inputs.commit }}
+      workflow_config: ${{ inputs.workflow_config }}
+      suite_name: cas
+      suite_executable: regression.py
+      output_format: new-fails
+      flags: --with-analyzer
+      timeout_minutes: 180
+      runner_arch: ${{ inputs.arch }}
+      runner_type: ${{ inputs.runner_type }}
+      build_sha: ${{ inputs.build_sha }}
+      set_commit_status: true
+      job_name: cas_s3_cache
+      regression_args: --cas-s3-cache
+    secrets: inherit
+
   CAS:
     if: |
       contains(fromJson(inputs.workflow_config).workflow_config.custom_data.version.string, 'antalya') &&
@@ -668,7 +750,11 @@ jobs:
           - PART: 1
             FILTER: --only "/lightweight delete/disk space/*"
           - PART: 2
-            FILTER: --skip "/lightweight delete/disk space/*"
+            FILTER: --only "/lightweight delete/hard restart/*"
+          - PART: 3
+            FILTER: --skip "/lightweight delete/disk space/*" "/lightweight delete/hard restart/*" "/lightweight delete/alter after delete/*" "/lightweight delete/concurrent alter and delete/*" "/lightweight delete/concurrent delete/*" "/lightweight delete/basic checks/*" "/lightweight delete/performance/*" "/lightweight delete/ontime tests/*"
+          - PART: 4
+            FILTER: --only "/lightweight delete/alter after delete/*" "/lightweight delete/concurrent alter and delete/*" "/lightweight delete/concurrent delete/*" "/lightweight delete/basic checks/*" "/lightweight delete/performance/*" "/lightweight delete/ontime tests/*"
     uses: ./.github/workflows/regression-reusable-suite.yml
     with:
       ref: ${{ inputs.commit }}
@@ -702,7 +788,11 @@ jobs:
           - PART: 1
             FILTER: --only "/lightweight delete/disk space/*"
           - PART: 2
-            FILTER: --skip "/lightweight delete/disk space/*"
+            FILTER: --only "/lightweight delete/hard restart/*"
+          - PART: 3
+            FILTER: --skip "/lightweight delete/disk space/*" "/lightweight delete/hard restart/*" "/lightweight delete/alter after delete/*" "/lightweight delete/concurrent alter and delete/*" "/lightweight delete/concurrent delete/*" "/lightweight delete/basic checks/*" "/lightweight delete/performance/*" "/lightweight delete/ontime tests/*"
+          - PART: 4
+            FILTER: --only "/lightweight delete/alter after delete/*" "/lightweight delete/concurrent alter and delete/*" "/lightweight delete/concurrent delete/*" "/lightweight delete/basic checks/*" "/lightweight delete/performance/*" "/lightweight delete/ontime tests/*"
     uses: ./.github/workflows/regression-reusable-suite.yml
     with:
       ref: ${{ inputs.commit }}
@@ -738,6 +828,8 @@ jobs:
             PART: 1
           - ONLY: attach
             PART: 2
+          - ONLY: attach
+            PART: 3
     uses: ./.github/workflows/regression-reusable-suite.yml
     with:
       ref: ${{ inputs.commit }}
@@ -750,6 +842,7 @@ jobs:
       runner_arch: ${{ inputs.arch }}
       runner_type: ${{ inputs.runner_type }}
       part: ${{ matrix.PART }}
+      storage_path: /${{ matrix.ONLY }}_partition
       build_sha: ${{ inputs.build_sha }}
       set_commit_status: true
       job_name: cas_alter_${{ matrix.ONLY }}
@@ -773,6 +866,8 @@ jobs:
             PART: 1
           - ONLY: attach
             PART: 2
+          - ONLY: attach
+            PART: 3
     uses: ./.github/workflows/regression-reusable-suite.yml
     with:
       ref: ${{ inputs.commit }}
@@ -785,6 +880,7 @@ jobs:
       runner_arch: ${{ inputs.arch }}
       runner_type: ${{ inputs.runner_type }}
       part: ${{ matrix.PART }}
+      storage_path: /${{ matrix.ONLY }}_partition
       build_sha: ${{ inputs.build_sha }}
       set_commit_status: true
       job_name: cas_s3_cache_alter_${{ matrix.ONLY }}
diff --git a/tests/integration/test_s3_cluster/test.py b/tests/integration/test_s3_cluster/test.py
index 1aa1d56cc648c..522e3031d305f 100644
--- a/tests/integration/test_s3_cluster/test.py
+++ b/tests/integration/test_s3_cluster/test.py
@@ -163,7 +163,8 @@ def started_cluster():
             "c2.s0_0_1",
             main_configs=["configs/cluster.xml", "configs/named_collections.xml", "configs/hidden_clusters.xml"],
             user_configs=["configs/users.xml"],
-            macros={"replica": "replica2", "shard": "shard1"},
+            # Must be unique per instance: the database disk prefix is .../test-{shard}|{replica}
+            macros={"replica": "replica2_c2", "shard": "shard1"},
             with_zookeeper=True,
             stay_alive=True,
         )
diff --git a/tests/queries/0_stateless/03572_export_merge_tree_part_basic.sh b/tests/queries/0_stateless/03572_export_merge_tree_part_basic.sh
index fc5df9b541da8..804b1849d3165 100755
--- a/tests/queries/0_stateless/03572_export_merge_tree_part_basic.sh
+++ b/tests/queries/0_stateless/03572_export_merge_tree_part_basic.sh
@@ -6,6 +6,9 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 # shellcheck source=../shell_config.sh
 . "$CURDIR"/../shell_config.sh
 
+# shellcheck source=./export_part.lib
+. "$CURDIR"/export_part.lib
+
 mt_table="mt_table_${RANDOM}"
 mt_table_partition_expression_with_function="mt_table_partition_expression_with_function_${RANDOM}"
 s3_table="s3_table_${RANDOM}"
@@ -46,8 +49,8 @@ echo "---- Export 3: Export 2020_1_1_0 and 2021_2_2_0 to wildcard table with par
 query "ALTER TABLE $mt_table_partition_expression_with_function EXPORT PART 'cb217c742dc7d143b61583011996a160_1_1_0' TO TABLE $s3_table_wildcard_partition_expression_with_function SETTINGS allow_experimental_export_merge_tree_part = 1"
 query "ALTER TABLE $mt_table_partition_expression_with_function EXPORT PART '3be6d49ecf9749a383964bc6fab22d10_2_2_0' TO TABLE $s3_table_wildcard_partition_expression_with_function SETTINGS allow_experimental_export_merge_tree_part = 1"
 
-# below exports are using parts that were exported in export 1 and export 2, so we need to wait for them to complete
-sleep 5
+# wait until part_log has 6 ExportPart records
+wait_for_exports 6
 
 echo "---- Export 4: Export the same part again, it should be idempotent"
 query "ALTER TABLE $mt_table EXPORT PART '2020_1_1_0' TO TABLE $s3_table SETTINGS allow_experimental_export_merge_tree_part = 1"
@@ -55,8 +58,8 @@ query "ALTER TABLE $mt_table EXPORT PART '2020_1_1_0' TO TABLE $s3_table SETTING
 echo "---- Export 5: Export the same part again to wildcard, it should be idempotent"
 query "ALTER TABLE $mt_table EXPORT PART '2022_3_3_0' TO TABLE $s3_table_wildcard SETTINGS allow_experimental_export_merge_tree_part = 1"
 
-# ONE BIG SLEEP after all exports
-sleep 15
+# wait until part_log has 8 ExportPart records (6 from the previous exports)
+wait_for_exports 8
 
 # ============================================================================
 # ALL SELECTS/VERIFICATIONS HAPPEN HERE
diff --git a/tests/queries/0_stateless/03572_export_merge_tree_part_special_columns.sh b/tests/queries/0_stateless/03572_export_merge_tree_part_special_columns.sh
index 0164dd70c4e01..1dc66f49e66bc 100755
--- a/tests/queries/0_stateless/03572_export_merge_tree_part_special_columns.sh
+++ b/tests/queries/0_stateless/03572_export_merge_tree_part_special_columns.sh
@@ -6,6 +6,9 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 # shellcheck source=../shell_config.sh
 . "$CURDIR"/../shell_config.sh
 
+# shellcheck source=./export_part.lib
+. "$CURDIR"/export_part.lib
+
 mt_alias="mt_alias_${RANDOM}"
 mt_materialized="mt_materialized_${RANDOM}"
 s3_alias_export="s3_alias_export_${RANDOM}"
@@ -112,7 +115,8 @@ query "ALTER TABLE $mt_mixed EXPORT PART '$mixed_part_2' TO TABLE FUNCTION s3(s3
 query "ALTER TABLE $mt_complex_expr EXPORT PART '$complex_expr_part' TO TABLE $s3_complex_expr_export SETTINGS allow_experimental_export_merge_tree_part = 1"
 
 # ONE BIG SLEEP after all exports
-sleep 20
+# wait until part_log has 6 ExportPart records
+wait_for_exports 6
 
 # ============================================================================
 # ALL SELECTS/VERIFICATIONS HAPPEN HERE
diff --git a/tests/queries/0_stateless/03608_export_merge_tree_part_filename_pattern.sh b/tests/queries/0_stateless/03608_export_merge_tree_part_filename_pattern.sh
index 12b47f4f26648..fa8b1c7c4dafa 100755
--- a/tests/queries/0_stateless/03608_export_merge_tree_part_filename_pattern.sh
+++ b/tests/queries/0_stateless/03608_export_merge_tree_part_filename_pattern.sh
@@ -6,6 +6,9 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 # shellcheck source=../shell_config.sh
 . "$CURDIR"/../shell_config.sh
 
+# shellcheck source=./export_part.lib
+. "$CURDIR"/export_part.lib
+
 R=$RANDOM
 mt="mt_${R}"
 dest1="fp_dest1_${R}"
@@ -27,21 +30,24 @@ query "CREATE TABLE $dest3 (id UInt64, year UInt16) ENGINE = S3(s3_conn, filenam
 
 echo "---- Test: Default pattern {part_name}_{checksum}"
 query "ALTER TABLE $mt EXPORT PART '2020_1_1_0' TO TABLE $dest1 SETTINGS allow_experimental_export_merge_tree_part = 1, export_merge_tree_part_filename_pattern = '{part_name}_{checksum}'"
-sleep 3
+# wait until part_log has 1 ExportPart record
+wait_for_exports 1
 query "SELECT * FROM $dest1 ORDER BY id"
 echo "---- Verify filename matches 2020_1_1_0_*.1.parquet"
 query "SELECT count() FROM s3(s3_conn, filename='$dest1/**/2020_1_1_0_*.1.parquet', format='One')"
 
 echo "---- Test: Custom prefix pattern"
 query "ALTER TABLE $mt EXPORT PART '2021_2_2_0' TO TABLE $dest2 SETTINGS allow_experimental_export_merge_tree_part = 1, export_merge_tree_part_filename_pattern = 'myprefix_{part_name}'"
-sleep 3
+# wait until part_log has 2 ExportPart records (1 from the previous export)
+wait_for_exports 2
 query "SELECT * FROM $dest2 ORDER BY id"
 echo "---- Verify filename matches myprefix_2021_2_2_0.1.parquet"
 query "SELECT count() FROM s3(s3_conn, filename='$dest2/**/myprefix_2021_2_2_0.1.parquet', format='One')"
 
 echo "---- Test: Pattern with macros"
 query "ALTER TABLE $mt EXPORT PART '2020_1_1_0' TO TABLE $dest3 SETTINGS allow_experimental_export_merge_tree_part = 1, export_merge_tree_part_filename_pattern = '{database}_{table}_{part_name}'"
-sleep 3
+# wait until part_log has 3 ExportPart records (2 from the previous exports)
+wait_for_exports 3
 query "SELECT * FROM $dest3 ORDER BY id"
 echo "---- Verify macros expanded (no literal braces in parquet filenames, that's the best we can do for stateless tests)"
 query "SELECT count() = 0 FROM s3(s3_conn, filename='$dest3/**/*.1.parquet', format='One') WHERE _file LIKE '%{%'"
diff --git a/tests/queries/0_stateless/export_part.lib b/tests/queries/0_stateless/export_part.lib
new file mode 100644
index 0000000000000..453bef86410d7
--- /dev/null
+++ b/tests/queries/0_stateless/export_part.lib
@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+# EXPORT PART runs in the background, so wait for it instead of sleeping.
+# $1 is how many exports should have completed by this point, counted from the start of
+# the test (part_log is not cleared during a run, so the number is cumulative).
+function wait_for_exports()
+{
+    local expected=$1
+    local database=${2:-$CLICKHOUSE_DATABASE}
+    local timeout=${3:-120}
+
+    while [[ $timeout -gt 0 ]]
+    do
+        ${CLICKHOUSE_CLIENT} --query="SYSTEM FLUSH LOGS" > /dev/null 2>&1
+        res=$(${CLICKHOUSE_CLIENT} --query="SELECT count() FROM system.part_log WHERE event_type = 'ExportPart' AND database = '$database'")
+        [[ $res -ge $expected ]] && return 0
+
+        sleep 1
+        timeout=$((timeout - 1))
+    done
+
+    echo "Timed out while waiting for $expected export(s) to complete!" >&2
+    ${CLICKHOUSE_CLIENT} --query="SELECT source_table, part_name, elapsed FROM system.exports WHERE source_database = '$database'"
+    return 2
+}
+
+# vi: ft=bash