diff --git a/semantic/compare_test.go b/semantic/compare_test.go
index 2610a672..e42a935d 100644
--- a/semantic/compare_test.go
+++ b/semantic/compare_test.go
@@ -151,8 +151,6 @@ func expectEcosystemCompareResult(
 }
 
 func TestVersion_Compare_Ecosystems(t *testing.T) {
-	t.Parallel()
-
 	tests := []struct {
 		name string
 		file string
@@ -240,8 +238,6 @@ func TestVersion_Compare_Ecosystems(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
-
 			runAgainstEcosystemFixture(t, tt.name, tt.file)
 		})
 	}
diff --git a/semantic/parse_test.go b/semantic/parse_test.go
index 024eac0e..b09154aa 100644
--- a/semantic/parse_test.go
+++ b/semantic/parse_test.go
@@ -27,8 +27,6 @@ func knownEcosystems() []string {
 }
 
 func TestParse(t *testing.T) {
-	t.Parallel()
-
 	ecosystems := knownEcosystems()
 
 	ecosystems = append(ecosystems, "Alpine", "Debian", "Ubuntu")
@@ -43,8 +41,6 @@ func TestParse(t *testing.T) {
 }
 
 func TestMustParse(t *testing.T) {
-	t.Parallel()
-
 	defer func() {
 		if r := recover(); r != nil {
 			t.Errorf("unexpected panic - '%s'", r)
@@ -61,8 +57,6 @@ func TestMustParse(t *testing.T) {
 }
 
 func TestMustParse_Panic(t *testing.T) {
-	t.Parallel()
-
 	defer func() { _ = recover() }()
 
 	semantic.MustParse("", "<unknown>")