diff --git a/sdks/go/pkg/beam/runners/prism/internal/stage.go b/sdks/go/pkg/beam/runners/prism/internal/stage.go
index 3d1e506f5e32..da23ca8ccce1 100644
--- a/sdks/go/pkg/beam/runners/prism/internal/stage.go
+++ b/sdks/go/pkg/beam/runners/prism/internal/stage.go
@@ -55,15 +55,17 @@ type link struct {
 // account, but all serialization boundaries remain since the pcollections
 // would continue to get serialized.
 type stage struct {
-	ID                   string
-	transforms           []string
-	primaryInput         string          // PCollection used as the parallel input.
-	outputs              []link          // PCollections that must escape this stage.
-	sideInputs           []engine.LinkID // Non-parallel input PCollections and their consumers
-	internalCols         []string        // PCollections that escape. Used for precise coder sending.
-	envID                string
-	stateful             bool
-	hasTimers            []string
+	ID           string
+	transforms   []string
+	primaryInput string          // PCollection used as the parallel input.
+	outputs      []link          // PCollections that must escape this stage.
+	sideInputs   []engine.LinkID // Non-parallel input PCollections and their consumers
+	internalCols []string        // PCollections that escape. Used for precise coder sending.
+	envID        string
+	stateful     bool
+	// hasTimers indicates the transform+timerfamily pairs that need to be waited on for
+	// the stage to be considered complete.
+	hasTimers            []struct{ Transform, TimerFamily string }
 	processingTimeTimers map[string]bool
 
 	exe              transformExecuter
@@ -396,7 +398,7 @@ func buildDescriptor(stg *stage, comps *pipepb.Components, wk *worker.W, em *eng
 			}
 		}
 		for timerID, v := range pardo.GetTimerFamilySpecs() {
-			stg.hasTimers = append(stg.hasTimers, tid)
+			stg.hasTimers = append(stg.hasTimers, struct{ Transform, TimerFamily string }{Transform: tid, TimerFamily: timerID})
 			if v.TimeDomain == pipepb.TimeDomain_PROCESSING_TIME {
 				if stg.processingTimeTimers == nil {
 					stg.processingTimeTimers = map[string]bool{}
diff --git a/sdks/go/pkg/beam/runners/prism/internal/worker/bundle.go b/sdks/go/pkg/beam/runners/prism/internal/worker/bundle.go
index 842c5fdfc19d..50e427ca36f5 100644
--- a/sdks/go/pkg/beam/runners/prism/internal/worker/bundle.go
+++ b/sdks/go/pkg/beam/runners/prism/internal/worker/bundle.go
@@ -42,7 +42,7 @@ type B struct {
 	InputTransformID       string
 	Input                  []*engine.Block // Data and Timers for this bundle.
 	EstimatedInputElements int
-	HasTimers              []string
+	HasTimers              []struct{ Transform, TimerFamily string } // Timer streams to terminate.
 
 	// IterableSideInputData is a map from transformID + inputID, to window, to data.
 	IterableSideInputData map[SideInputKey]map[typex.Window][][]byte
@@ -175,7 +175,8 @@ func (b *B) ProcessOn(ctx context.Context, wk *W) <-chan struct{} {
 	for _, tid := range b.HasTimers {
 		timers = append(timers, &fnpb.Elements_Timers{
 			InstructionId: b.InstID,
-			TransformId:   tid,
+			TransformId:   tid.Transform,
+			TimerFamilyId: tid.TimerFamily,
 			IsLast:        true,
 		})
 	}
diff --git a/sdks/python/apache_beam/runners/portability/prism_runner_test.py b/sdks/python/apache_beam/runners/portability/prism_runner_test.py
index 387b7ba2bec7..04a2dbd4faed 100644
--- a/sdks/python/apache_beam/runners/portability/prism_runner_test.py
+++ b/sdks/python/apache_beam/runners/portability/prism_runner_test.py
@@ -35,7 +35,6 @@
 from apache_beam.runners.portability import portable_runner_test
 from apache_beam.testing.util import assert_that
 from apache_beam.testing.util import equal_to
-from apache_beam.transforms import userstate
 from apache_beam.transforms import window
 from apache_beam.utils import timestamp
 
@@ -195,37 +194,6 @@ def test_windowing(self):
       assert_that(
           res, equal_to([('k', [1, 2]), ('k', [100, 101, 102]), ('k', [123])]))
 
-  # The fn_runner_test.py version of this test doesn't execute the process
-  # method for some reason. Overridden here to validate that the cleared
-  # timer won't re-fire.
-  def test_pardo_timers_clear(self):
-    timer_spec = userstate.TimerSpec('timer', userstate.TimeDomain.WATERMARK)
-
-    class TimerDoFn(beam.DoFn):
-      def process(self, element, timer=beam.DoFn.TimerParam(timer_spec)):
-        unused_key, ts = element
-        timer.set(ts)
-        timer.set(2 * ts)
-
-      @userstate.on_timer(timer_spec)
-      def process_timer(
-          self,
-          ts=beam.DoFn.TimestampParam,
-          timer=beam.DoFn.TimerParam(timer_spec)):
-        timer.set(timestamp.Timestamp(micros=2 * ts.micros))
-        timer.clear()  # Shouldn't fire again
-        yield 'fired'
-
-    with self.create_pipeline() as p:
-      actual = (
-          p
-          | beam.Create([('k1', 10), ('k2', 100)])
-          | beam.ParDo(TimerDoFn())
-          | beam.Map(lambda x, ts=beam.DoFn.TimestampParam: (x, ts)))
-
-      expected = [('fired', ts) for ts in (20, 200)]
-      assert_that(actual, equal_to(expected))
-
   # Can't read host files from within docker, read a "local" file there.
   def test_read(self):
     print('name:', __name__)