diff --git a/container/dispatcher_test.go b/container/dispatcher_test.go
index 74d77f4..69d698a 100644
--- a/container/dispatcher_test.go
+++ b/container/dispatcher_test.go
@@ -115,7 +115,7 @@ func checkSimple(t *testing.T, fname string, testCases []simpleTestCase) {
 		t.Run(tc.name, func(t *testing.T) {
 			defer handleExitStub()
 			k := &kstub{t: t, want: tc.want, wg: new(sync.WaitGroup)}
-			if err := tc.f(k); !errors.Is(err, tc.wantErr) {
+			if err := tc.f(k); !reflect.DeepEqual(err, tc.wantErr) {
 				t.Errorf("%s: error = %v, want %v", fname, err, tc.wantErr)
 			}
 			k.handleIncomplete(func(k *kstub) {
diff --git a/container/mount_test.go b/container/mount_test.go
index f2f8e29..cf21e81 100644
--- a/container/mount_test.go
+++ b/container/mount_test.go
@@ -90,7 +90,7 @@ func TestRemount(t *testing.T) {
 		}, [][]kexpect{{
 			{"evalSymlinks", expectArgs{"/sysroot/nix"}, "/sysroot/nix", nil},
 			{"open", expectArgs{"/sysroot/nix", 0x280000, uint32(0)}, 0xdeadbeef, errUnique},
-		}}, errUnique},
+		}}, &os.PathError{Op: "open", Path: "/sysroot/nix", Err: errUnique}},
 
 		{"readlink", func(k syscallDispatcher) error {
 			return newProcPaths(k, hostPath).remount("/sysroot/nix", syscall.MS_REC|syscall.MS_RDONLY|syscall.MS_NODEV)
@@ -107,7 +107,7 @@ func TestRemount(t *testing.T) {
 			{"open", expectArgs{"/sysroot/nix", 0x280000, uint32(0)}, 0xdeadbeef, nil},
 			{"readlink", expectArgs{"/host/proc/self/fd/3735928559"}, "/sysroot/nix", nil},
 			{"close", expectArgs{0xdeadbeef}, nil, errUnique},
-		}}, errUnique},
+		}}, &os.PathError{Op: "close", Path: "/sysroot/nix", Err: errUnique}},
 
 		{"mountinfo no match", func(k syscallDispatcher) error {
 			return newProcPaths(k, hostPath).remount("/sysroot/nix", syscall.MS_REC|syscall.MS_RDONLY|syscall.MS_NODEV)