diff --git a/internal/archiver/archiver_test.go b/internal/archiver/archiver_test.go
index e18156ceb..0d6295c39 100644
--- a/internal/archiver/archiver_test.go
+++ b/internal/archiver/archiver_test.go
@@ -1894,7 +1894,7 @@ func TestArchiverContextCanceled(t *testing.T) {
 	defer removeTempdir()
 
 	// Ensure that the archiver itself reports the canceled context and not just the backend
-	repo, _ := repository.TestRepositoryWithBackend(t, &noCancelBackend{mem.New()})
+	repo, _ := repository.TestRepositoryWithBackend(t, &noCancelBackend{mem.New()}, 0)
 
 	back := restictest.Chdir(t, tempdir)
 	defer back()
diff --git a/internal/repository/master_index_test.go b/internal/repository/master_index_test.go
index 2470dadfc..28a2c1251 100644
--- a/internal/repository/master_index_test.go
+++ b/internal/repository/master_index_test.go
@@ -335,8 +335,8 @@ var (
 	depth        = 3
 )
 
-func createFilledRepo(t testing.TB, snapshots int, dup float32) (restic.Repository, func()) {
-	repo, cleanup := repository.TestRepository(t)
+func createFilledRepo(t testing.TB, snapshots int, dup float32, version uint) (restic.Repository, func()) {
+	repo, cleanup := repository.TestRepositoryWithVersion(t, version)
 
 	for i := 0; i < 3; i++ {
 		restic.TestCreateSnapshot(t, repo, snapshotTime.Add(time.Duration(i)*time.Second), depth, dup)
@@ -346,7 +346,11 @@ func createFilledRepo(t testing.TB, snapshots int, dup float32) (restic.Reposito
 }
 
 func TestIndexSave(t *testing.T) {
-	repo, cleanup := createFilledRepo(t, 3, 0)
+	repository.TestAllVersions(t, testIndexSave)
+}
+
+func testIndexSave(t *testing.T, version uint) {
+	repo, cleanup := createFilledRepo(t, 3, 0, version)
 	defer cleanup()
 
 	err := repo.LoadIndex(context.TODO())
diff --git a/internal/repository/repack_test.go b/internal/repository/repack_test.go
index e40f5f6af..b86c8c95d 100644
--- a/internal/repository/repack_test.go
+++ b/internal/repository/repack_test.go
@@ -212,7 +212,11 @@ func reloadIndex(t *testing.T, repo restic.Repository) {
 }
 
 func TestRepack(t *testing.T) {
-	repo, cleanup := repository.TestRepository(t)
+	repository.TestAllVersions(t, testRepack)
+}
+
+func testRepack(t *testing.T, version uint) {
+	repo, cleanup := repository.TestRepositoryWithVersion(t, version)
 	defer cleanup()
 
 	seed := time.Now().UnixNano()
@@ -279,9 +283,13 @@ func TestRepack(t *testing.T) {
 }
 
 func TestRepackCopy(t *testing.T) {
-	repo, cleanup := repository.TestRepository(t)
+	repository.TestAllVersions(t, testRepackCopy)
+}
+
+func testRepackCopy(t *testing.T, version uint) {
+	repo, cleanup := repository.TestRepositoryWithVersion(t, version)
 	defer cleanup()
-	dstRepo, dstCleanup := repository.TestRepository(t)
+	dstRepo, dstCleanup := repository.TestRepositoryWithVersion(t, version)
 	defer dstCleanup()
 
 	seed := time.Now().UnixNano()
@@ -318,7 +326,11 @@ func TestRepackCopy(t *testing.T) {
 }
 
 func TestRepackWrongBlob(t *testing.T) {
-	repo, cleanup := repository.TestRepository(t)
+	repository.TestAllVersions(t, testRepackWrongBlob)
+}
+
+func testRepackWrongBlob(t *testing.T, version uint) {
+	repo, cleanup := repository.TestRepositoryWithVersion(t, version)
 	defer cleanup()
 
 	seed := time.Now().UnixNano()
diff --git a/internal/repository/repository_test.go b/internal/repository/repository_test.go
index 6da685ff3..f2daaf194 100644
--- a/internal/repository/repository_test.go
+++ b/internal/repository/repository_test.go
@@ -28,7 +28,11 @@ var testSizes = []int{5, 23, 2<<18 + 23, 1 << 20}
 var rnd = rand.New(rand.NewSource(time.Now().UnixNano()))
 
 func TestSave(t *testing.T) {
-	repo, cleanup := repository.TestRepository(t)
+	repository.TestAllVersions(t, testSave)
+}
+
+func testSave(t *testing.T, version uint) {
+	repo, cleanup := repository.TestRepositoryWithVersion(t, version)
 	defer cleanup()
 
 	for _, size := range testSizes {
@@ -63,7 +67,11 @@ func TestSave(t *testing.T) {
 }
 
 func TestSaveFrom(t *testing.T) {
-	repo, cleanup := repository.TestRepository(t)
+	repository.TestAllVersions(t, testSaveFrom)
+}
+
+func testSaveFrom(t *testing.T, version uint) {
+	repo, cleanup := repository.TestRepositoryWithVersion(t, version)
 	defer cleanup()
 
 	for _, size := range testSizes {
@@ -96,7 +104,11 @@ func TestSaveFrom(t *testing.T) {
 }
 
 func BenchmarkSaveAndEncrypt(t *testing.B) {
-	repo, cleanup := repository.TestRepository(t)
+	repository.BenchmarkAllVersions(t, benchmarkSaveAndEncrypt)
+}
+
+func benchmarkSaveAndEncrypt(t *testing.B, version uint) {
+	repo, cleanup := repository.TestRepositoryWithVersion(t, version)
 	defer cleanup()
 
 	size := 4 << 20 // 4MiB
@@ -118,7 +130,11 @@ func BenchmarkSaveAndEncrypt(t *testing.B) {
 }
 
 func TestLoadTree(t *testing.T) {
-	repo, cleanup := repository.TestRepository(t)
+	repository.TestAllVersions(t, testLoadTree)
+}
+
+func testLoadTree(t *testing.T, version uint) {
+	repo, cleanup := repository.TestRepositoryWithVersion(t, version)
 	defer cleanup()
 
 	if rtest.BenchArchiveDirectory == "" {
@@ -134,7 +150,11 @@ func TestLoadTree(t *testing.T) {
 }
 
 func BenchmarkLoadTree(t *testing.B) {
-	repo, cleanup := repository.TestRepository(t)
+	repository.BenchmarkAllVersions(t, benchmarkLoadTree)
+}
+
+func benchmarkLoadTree(t *testing.B, version uint) {
+	repo, cleanup := repository.TestRepositoryWithVersion(t, version)
 	defer cleanup()
 
 	if rtest.BenchArchiveDirectory == "" {
@@ -154,7 +174,11 @@ func BenchmarkLoadTree(t *testing.B) {
 }
 
 func TestLoadBlob(t *testing.T) {
-	repo, cleanup := repository.TestRepository(t)
+	repository.TestAllVersions(t, testLoadBlob)
+}
+
+func testLoadBlob(t *testing.T, version uint) {
+	repo, cleanup := repository.TestRepositoryWithVersion(t, version)
 	defer cleanup()
 
 	length := 1000000
@@ -183,7 +207,11 @@ func TestLoadBlob(t *testing.T) {
 }
 
 func BenchmarkLoadBlob(b *testing.B) {
-	repo, cleanup := repository.TestRepository(b)
+	repository.BenchmarkAllVersions(b, benchmarkLoadBlob)
+}
+
+func benchmarkLoadBlob(b *testing.B, version uint) {
+	repo, cleanup := repository.TestRepositoryWithVersion(b, version)
 	defer cleanup()
 
 	length := 1000000
@@ -219,7 +247,11 @@ func BenchmarkLoadBlob(b *testing.B) {
 }
 
 func BenchmarkLoadUnpacked(b *testing.B) {
-	repo, cleanup := repository.TestRepository(b)
+	repository.BenchmarkAllVersions(b, benchmarkLoadUnpacked)
+}
+
+func benchmarkLoadUnpacked(b *testing.B, version uint) {
+	repo, cleanup := repository.TestRepositoryWithVersion(b, version)
 	defer cleanup()
 
 	length := 1000000
@@ -255,7 +287,11 @@ func BenchmarkLoadUnpacked(b *testing.B) {
 }
 
 func TestLoadJSONUnpacked(t *testing.T) {
-	repo, cleanup := repository.TestRepository(t)
+	repository.TestAllVersions(t, testLoadJSONUnpacked)
+}
+
+func testLoadJSONUnpacked(t *testing.T, version uint) {
+	repo, cleanup := repository.TestRepositoryWithVersion(t, version)
 	defer cleanup()
 
 	if rtest.BenchArchiveDirectory == "" {
@@ -313,9 +349,13 @@ func loadIndex(ctx context.Context, repo restic.Repository, id restic.ID) (*repo
 }
 
 func BenchmarkLoadIndex(b *testing.B) {
+	repository.BenchmarkAllVersions(b, benchmarkLoadIndex)
+}
+
+func benchmarkLoadIndex(b *testing.B, version uint) {
 	repository.TestUseLowSecurityKDFParameters(b)
 
-	repo, cleanup := repository.TestRepository(b)
+	repo, cleanup := repository.TestRepositoryWithVersion(b, version)
 	defer cleanup()
 
 	idx := repository.NewIndex()
@@ -362,7 +402,11 @@ func saveRandomDataBlobs(t testing.TB, repo restic.Repository, num int, sizeMax
 }
 
 func TestRepositoryIncrementalIndex(t *testing.T) {
-	r, cleanup := repository.TestRepository(t)
+	repository.TestAllVersions(t, testRepositoryIncrementalIndex)
+}
+
+func testRepositoryIncrementalIndex(t *testing.T, version uint) {
+	r, cleanup := repository.TestRepositoryWithVersion(t, version)
 	defer cleanup()
 
 	repo := r.(*repository.Repository)
diff --git a/internal/repository/testing.go b/internal/repository/testing.go
index fbe334467..05dfab64d 100644
--- a/internal/repository/testing.go
+++ b/internal/repository/testing.go
@@ -2,6 +2,7 @@ package repository
 
 import (
 	"context"
+	"fmt"
 	"os"
 	"testing"
 
@@ -41,7 +42,7 @@ const TestChunkerPol = chunker.Pol(0x3DA3358B4DC173)
 // TestRepositoryWithBackend returns a repository initialized with a test
 // password. If be is nil, an in-memory backend is used. A constant polynomial
 // is used for the chunker and low-security test parameters.
-func TestRepositoryWithBackend(t testing.TB, be restic.Backend) (r restic.Repository, cleanup func()) {
+func TestRepositoryWithBackend(t testing.TB, be restic.Backend, version uint) (r restic.Repository, cleanup func()) {
 	t.Helper()
 	TestUseLowSecurityKDFParameters(t)
 	restic.TestDisableCheckPolynomial(t)
@@ -53,7 +54,7 @@ func TestRepositoryWithBackend(t testing.TB, be restic.Backend) (r restic.Reposi
 
 	repo := New(be, Options{})
 
-	cfg := restic.TestCreateConfig(t, TestChunkerPol)
+	cfg := restic.TestCreateConfig(t, TestChunkerPol, version)
 	err := repo.init(context.TODO(), test.TestPassword, cfg)
 	if err != nil {
 		t.Fatalf("TestRepository(): initialize repo failed: %v", err)
@@ -71,6 +72,11 @@ func TestRepositoryWithBackend(t testing.TB, be restic.Backend) (r restic.Reposi
 // a non-existing directory, a local backend is created there and this is used
 // instead. The directory is not removed, but left there for inspection.
 func TestRepository(t testing.TB) (r restic.Repository, cleanup func()) {
+	t.Helper()
+	return TestRepositoryWithVersion(t, 0)
+}
+
+func TestRepositoryWithVersion(t testing.TB, version uint) (r restic.Repository, cleanup func()) {
 	t.Helper()
 	dir := os.Getenv("RESTIC_TEST_REPO")
 	if dir != "" {
@@ -80,7 +86,7 @@ func TestRepository(t testing.TB) (r restic.Repository, cleanup func()) {
 			if err != nil {
 				t.Fatalf("error creating local backend at %v: %v", dir, err)
 			}
-			return TestRepositoryWithBackend(t, be)
+			return TestRepositoryWithBackend(t, be, version)
 		}
 
 		if err == nil {
@@ -88,7 +94,7 @@ func TestRepository(t testing.TB) (r restic.Repository, cleanup func()) {
 		}
 	}
 
-	return TestRepositoryWithBackend(t, nil)
+	return TestRepositoryWithBackend(t, nil, version)
 }
 
 // TestOpenLocal opens a local repository.
@@ -106,3 +112,23 @@ func TestOpenLocal(t testing.TB, dir string) (r restic.Repository) {
 
 	return repo
 }
+
+type VersionedTest func(t *testing.T, version uint)
+
+func TestAllVersions(t *testing.T, test VersionedTest) {
+	for version := restic.MinRepoVersion; version <= restic.MaxRepoVersion; version++ {
+		t.Run(fmt.Sprintf("v%d", version), func(t *testing.T) {
+			test(t, uint(version))
+		})
+	}
+}
+
+type VersionedBenchmark func(b *testing.B, version uint)
+
+func BenchmarkAllVersions(b *testing.B, bench VersionedBenchmark) {
+	for version := restic.MinRepoVersion; version <= restic.MaxRepoVersion; version++ {
+		b.Run(fmt.Sprintf("v%d", version), func(b *testing.B) {
+			bench(b, uint(version))
+		})
+	}
+}
diff --git a/internal/restic/config.go b/internal/restic/config.go
index 3a6bab746..6df32e2ef 100644
--- a/internal/restic/config.go
+++ b/internal/restic/config.go
@@ -51,11 +51,17 @@ func CreateConfig(version uint) (Config, error) {
 }
 
 // TestCreateConfig creates a config for use within tests.
-func TestCreateConfig(t testing.TB, pol chunker.Pol) (cfg Config) {
+func TestCreateConfig(t testing.TB, pol chunker.Pol, version uint) (cfg Config) {
 	cfg.ChunkerPolynomial = pol
 
 	cfg.ID = NewRandomID().String()
-	cfg.Version = StableRepoVersion
+	if version == 0 {
+		version = StableRepoVersion
+	}
+	if version < MinRepoVersion || version > MaxRepoVersion {
+		t.Fatalf("version %d is out of range", version)
+	}
+	cfg.Version = version
 
 	return cfg
 }