diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 85a4fdb..c6f4ba6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -38,4 +38,4 @@ jobs:
       contents:      read  # to download code coverage results from unit_tests job
       pull-requests: write # write permission needed to comment on PR
     steps:
-      - uses: fgrosse/go-coverage-report@v1.0.2
+      - uses: fgrosse/go-coverage-report@01ee5ff151ab6148d4a30693f821b01bf2fe3bc8
diff --git a/max_heap_test.go b/max_heap_test.go
deleted file mode 100644
index 2d3549e..0000000
--- a/max_heap_test.go
+++ /dev/null
@@ -1,22 +0,0 @@
-package prioqueue_test
-
-import (
-	"testing"
-
-	"github.com/fgrosse/prioqueue"
-)
-
-func TestMaxHeap(t *testing.T) {
-	var pq prioqueue.MaxHeap
-	runTests(t, &pq, assertBiggestFirst)
-}
-
-func TestNewMaxHeap(t *testing.T) {
-	pq2 := prioqueue.NewMaxHeap(10)
-	runTests(t, pq2, assertBiggestFirst)
-}
-
-func TestMaxHeap_Random(t *testing.T) {
-	pq := prioqueue.NewMaxHeap(10)
-	runTestsN(t, pq, assertBiggestFirst, 10_000)
-}