diff --git a/src/test/modules/gin/expected/gin_incomplete_splits.out b/src/test/modules/gin/expected/gin_incomplete_splits.out
index 15574e5..4bc5ef1 100644
--- a/src/test/modules/gin/expected/gin_incomplete_splits.out
+++ b/src/test/modules/gin/expected/gin_incomplete_splits.out
@@ -126,6 +126,12 @@ SELECT injection_points_attach('gin-leave-leaf-split-incomplete', 'error');
 select insert_until_fail(:next_i) as next_i
 \gset
 NOTICE:  failed with: error triggered for injection point gin-leave-leaf-split-incomplete
+SELECT pg_sleep(10);
+ pg_sleep 
+----------
+ 
+(1 row)
+
 SELECT injection_points_detach('gin-leave-leaf-split-incomplete');
  injection_points_detach 
 -------------------------
diff --git a/src/test/modules/gin/sql/gin_incomplete_splits.sql b/src/test/modules/gin/sql/gin_incomplete_splits.sql
index ebf0f62..fb66bac 100644
--- a/src/test/modules/gin/sql/gin_incomplete_splits.sql
+++ b/src/test/modules/gin/sql/gin_incomplete_splits.sql
@@ -118,6 +118,7 @@ select verify(:next_i);
 SELECT injection_points_attach('gin-leave-leaf-split-incomplete', 'error');
 select insert_until_fail(:next_i) as next_i
 \gset
+SELECT pg_sleep(10);
 SELECT injection_points_detach('gin-leave-leaf-split-incomplete');
 
 -- Verify that a scan works even though there's an incomplete split
diff --git a/src/test/modules/injection_points/injection_points.c b/src/test/modules/injection_points/injection_points.c
index a74a4a2..f9e8a1f 100644
--- a/src/test/modules/injection_points/injection_points.c
+++ b/src/test/modules/injection_points/injection_points.c
@@ -18,6 +18,7 @@
 #include "postgres.h"
 
 #include "fmgr.h"
+#include "libpq/pqsignal.h"
 #include "miscadmin.h"
 #include "storage/condition_variable.h"
 #include "storage/dsm_registry.h"
@@ -213,6 +214,14 @@ injection_points_cleanup(int code, Datum arg)
 void
 injection_error(const char *name)
 {
+	if (strcmp(name, "gin-leave-leaf-split-incomplete") == 0 &&
+		!injection_point_allowed(name))
+	{
+		sigprocmask(SIG_SETMASK, &BlockSig, NULL);
+		pg_usleep(20 * USECS_PER_SEC); /* let other suite detach */
+		sigprocmask(SIG_SETMASK, &UnBlockSig, NULL);
+	}
+
 	if (!injection_point_allowed(name))
 		return;