diff --git a/pkg/gohai/filesystem/filesystem_nix.go b/pkg/gohai/filesystem/filesystem_nix.go
index f25f6adc97d3e..27f5094d1e282 100644
--- a/pkg/gohai/filesystem/filesystem_nix.go
+++ b/pkg/gohai/filesystem/filesystem_nix.go
@@ -74,9 +74,7 @@ func replaceDev(oldMount, newMount MountInfo) bool {
 }
 
 // getFileSystemInfoWithMounts is an internal method to help testing with test mounts and mocking syscalls
-func getFileSystemInfoWithMounts(initialMounts []*mountinfo.Info, sizeKB, dev fsInfoGetter) ([]MountInfo, error) {
-	mounts := initialMounts
-
+func getFileSystemInfoWithMounts(mounts []*mountinfo.Info, sizeKB, dev fsInfoGetter) ([]MountInfo, error) {
 	devMountInfos := map[uint64]MountInfo{}
 	for _, mount := range mounts {
 		// Skip mounts that seem to be missing data
diff --git a/pkg/gohai/filesystem/filesystem_nix_test.go b/pkg/gohai/filesystem/filesystem_nix_test.go
index c41b7c369110d..55a7c92563370 100644
--- a/pkg/gohai/filesystem/filesystem_nix_test.go
+++ b/pkg/gohai/filesystem/filesystem_nix_test.go
@@ -117,7 +117,6 @@ func TestNixFSTypeFiltering(t *testing.T) {
 			mounts, err := getFileSystemInfoWithMounts(inputMounts, mockFSSizeKB, getMockFSDev())
 			require.NoError(t, err)
 
-			require.Equal(t, len(expectedMounts), len(mounts))
 			assert.ElementsMatch(t, mounts, expectedMounts)
 		})
 	}
@@ -260,8 +259,9 @@ func TestFilterDev(t *testing.T) {
 
 func newTestInputMountinfo(name string) *mountinfo.Info {
 	return &mountinfo.Info{
+		// add suffixes to the name to avoid having an ignored source / type / mountpoint
 		Source:     name + "Source",
-		FSType:     name,
+		FSType:     name + "Type",
 		Mountpoint: name + "MountPoint",
 	}
 }