diff --git a/tests/ibus_test.c b/tests/ibus_test.c
index 0035a07..d010a8d 100644
--- a/tests/ibus_test.c
+++ b/tests/ibus_test.c
@@ -326,6 +326,17 @@ cleanup:
 	ibusend(&f);
 }
 
+/* A second release is silent, and dropping frees the slot. */
+static void
+checkdrop(struct ct *t, Ibusfix *f, Ictx *ctx, char *path)
+{
+	releasecontext(ctx);
+	notrace(t, f);
+	dropcontext(ctx);
+	notrace(t, f);
+	CT_EQ_PTR(t, nil, findcontext(f->c1, path));
+}
+
 void
 ibus_context_lifecycle(struct ct *t)
 {
@@ -412,11 +423,7 @@ ibus_context_lifecycle(struct ct *t)
 	CT_CHECK(t, !a->caret.valid);
 	checkenginepreedit(t, "ん");
 	CT_EQ_PTR(t, b, testengineowner());
-	releasecontext(a);
-	notrace(t, &f);
-	dropcontext(a);
-	notrace(t, &f);
-	CT_EQ_PTR(t, nil, findcontext(f.c1, "/context/one"));
+	checkdrop(t, &f, a, "/context/one");
 
 	reused = newcontext(f.c1, "/context/stale-destroy");
 	CT_EQ_PTR(t, a, reused);
@@ -482,11 +489,7 @@ ibus_active_release_lifecycle(struct ct *t)
 	CT_CHECK(t, !ctx->focused);
 	checkenginepreedit(t, "");
 	CT_EQ_PTR(t, nil, testengineowner());
-	releasecontext(ctx);
-	notrace(t, &f);
-	dropcontext(ctx);
-	notrace(t, &f);
-	CT_EQ_PTR(t, nil, findcontext(f.c1, "/context/reset"));
+	checkdrop(t, &f, ctx, "/context/reset");
 
 	reused = newcontext(f.c1, "/context/destroy");
 	CT_EQ_PTR(t, ctx, reused);