diff --git a/pipelines/pingcap/tiflow/latest/ghpr_verify.groovy b/pipelines/pingcap/tiflow/latest/ghpr_verify.groovy
index 9d95cd12af..d948a9b10b 100644
--- a/pipelines/pingcap/tiflow/latest/ghpr_verify.groovy
+++ b/pipelines/pingcap/tiflow/latest/ghpr_verify.groovy
@@ -46,7 +46,19 @@ pipeline {
                                         }
                                     }
                                 }
-                                sh label: "${TEST_CMD}", script: "make ${TEST_CMD}"
+                                sh label: "${TEST_CMD}", script: """
+                                    set -euo pipefail
+                                    # TEMP: hard-code toolchain to avoid mixed go1.25.6/go1.25.8 compile errors in CI.
+                                    # TODO: remove after ghpr_verify golang image/env is fully upgraded to go1.25.8.
+                                    export GOTOOLCHAIN=go1.25.8
+                                    export GOCACHE=/tmp/go-build-${TEST_CMD}
+                                    go clean -cache
+
+                                    go version
+                                    go env GOTOOLCHAIN GOROOT GOCACHE
+
+                                    make ${TEST_CMD}
+                                """
                             }
                         }
                         post {
diff --git a/prow-jobs/pingcap/ticdc/latest-presubmits-next-gen.yaml b/prow-jobs/pingcap/ticdc/latest-presubmits-next-gen.yaml
index 8ae86e12d3..c92753b57b 100644
--- a/prow-jobs/pingcap/ticdc/latest-presubmits-next-gen.yaml
+++ b/prow-jobs/pingcap/ticdc/latest-presubmits-next-gen.yaml
@@ -107,6 +107,11 @@ presubmits:
             command: [bash, -ce]
             args:
               - |
+                # TEMP: force Go patch toolchain to avoid mixed go1.25.5/go1.25.8 artifacts.
+                # TODO: remove after ticdc next-gen unit-test image/env is consistently on go1.25.8.
+                export GOTOOLCHAIN=go1.25.8
+                export GOCACHE=/tmp/go-build-pull-unit-test-next-gen
+                go clean -cache
                 make unit_test_in_verify_ci_next_gen
             resources:
               requests:
diff --git a/prow-jobs/pingcap/ticdc/latest-presubmits.yaml b/prow-jobs/pingcap/ticdc/latest-presubmits.yaml
index 1bdb9e47b1..918787e1a5 100644
--- a/prow-jobs/pingcap/ticdc/latest-presubmits.yaml
+++ b/prow-jobs/pingcap/ticdc/latest-presubmits.yaml
@@ -154,6 +154,11 @@ presubmits:
             command: [bash, -ce]
             args:
               - |
+                # TEMP: force Go patch toolchain to avoid mixed go1.25.5/go1.25.8 artifacts.
+                # TODO: remove after ticdc unit-test image/env is consistently on go1.25.8.
+                export GOTOOLCHAIN=go1.25.8
+                export GOCACHE=/tmp/go-build-pull-unit-test
+                go clean -cache
                 make unit_test_in_verify_ci
             resources:
               requests: