diff --git a/osprepare/os_release_test.go b/osprepare/os_release_test.go
index 992c071eb..327d67311 100644
--- a/osprepare/os_release_test.go
+++ b/osprepare/os_release_test.go
@@ -45,6 +45,6 @@ func TestGetOsRelease(t *testing.T) {
 
 func TestParseReleaseFileNonExistent(t *testing.T) {
 	if res := ParseReleaseFile(NON_EXISTENT_FILE); res != nil {
-		t.Fatal("Expected nil, got %v\n", res)
+		t.Fatalf("Expected nil, got %v\n", res)
 	}
 }
diff --git a/osprepare/versions_test.go b/osprepare/versions_test.go
index ae84f56c0..46bad0450 100644
--- a/osprepare/versions_test.go
+++ b/osprepare/versions_test.go
@@ -43,7 +43,7 @@ func TestGetQemu(t *testing.T) {
 // this tests is expected to pass
 func TestVersionLessThanEqualVersion(t *testing.T) {
 	if res := VersionLessThan(MinQemuVersion, MinQemuVersion); res != false {
-		t.Fatal("expected false, got %v\n", res)
+		t.Fatalf("expected false, got %v\n", res)
 	}
 }
 
@@ -52,7 +52,7 @@ func TestVersionLessThanEqualVersion(t *testing.T) {
 // this tests is expected to pass
 func TestVersionLessThanGreaterVersion(t *testing.T) {
 	if res := VersionLessThan(MinQemuVersion, "0.0.1"); res != false {
-		t.Fatal("expected false, got %v\n", res)
+		t.Fatalf("expected false, got %v\n", res)
 	}
 }
 
@@ -61,6 +61,6 @@ func TestVersionLessThanGreaterVersion(t *testing.T) {
 // this tests is expected to pass
 func TestVersionLessThanLowerVersion(t *testing.T) {
 	if res := VersionLessThan("0.0.1", MinQemuVersion); res != true {
-		t.Fatal("expected true, got %v\n", res)
+		t.Fatalf("expected true, got %v\n", res)
 	}
 }