diff --git a/src/test/java/com/github/packageurl/PackageURLBuilderTest.java b/src/test/java/com/github/packageurl/PackageURLBuilderTest.java
index 4dda8a9..887972d 100644
--- a/src/test/java/com/github/packageurl/PackageURLBuilderTest.java
+++ b/src/test/java/com/github/packageurl/PackageURLBuilderTest.java
@@ -72,7 +72,7 @@ void packageURLBuilder(
             builder.withSubpath(subpath);
         }
         if (invalid) {
-            assertThrows(MalformedPackageURLException.class, builder::build);
+            assertThrows(MalformedPackageURLException.class, builder::build, "Build should fail due to " + description);
         } else {
             assertEquals(parameters.getType(), builder.getType(), "type");
             assertEquals(parameters.getNamespace(), builder.getNamespace(), "namespace");
@@ -109,13 +109,11 @@ void packageURLBuilderException1Null() throws MalformedPackageURLException {
     void packageURLBuilderException2() {
         assertThrowsExactly(
                 MalformedPackageURLException.class,
-                () -> {
-                    PackageURLBuilder.aPackageURL()
-                            .withType("type")
-                            .withNamespace("invalid//namespace")
-                            .withName("name")
-                            .build();
-                },
+                () -> PackageURLBuilder.aPackageURL()
+                        .withType("type")
+                        .withNamespace("invalid//namespace")
+                        .withName("name")
+                        .build(),
                 "Build should fail due to invalid namespace");
     }
 
@@ -123,13 +121,11 @@ void packageURLBuilderException2() {
     void packageURLBuilderException3() {
         assertThrowsExactly(
                 MalformedPackageURLException.class,
-                () -> {
-                    PackageURLBuilder.aPackageURL()
-                            .withType("typ^e")
-                            .withSubpath("invalid/name%2Fspace")
-                            .withName("name")
-                            .build();
-                },
+                () -> PackageURLBuilder.aPackageURL()
+                        .withType("typ^e")
+                        .withSubpath("invalid/name%2Fspace")
+                        .withName("name")
+                        .build(),
                 "Build should fail due to invalid subpath");
     }
 
@@ -137,12 +133,10 @@ void packageURLBuilderException3() {
     void packageURLBuilderException4() {
         assertThrowsExactly(
                 MalformedPackageURLException.class,
-                () -> {
-                    PackageURLBuilder.aPackageURL()
-                            .withType("0_type")
-                            .withName("name")
-                            .build();
-                },
+                () -> PackageURLBuilder.aPackageURL()
+                        .withType("0_type")
+                        .withName("name")
+                        .build(),
                 "Build should fail due to invalid type");
     }
 
@@ -150,13 +144,11 @@ void packageURLBuilderException4() {
     void packageURLBuilderException5() {
         assertThrowsExactly(
                 MalformedPackageURLException.class,
-                () -> {
-                    PackageURLBuilder.aPackageURL()
-                            .withType("ype")
-                            .withName("name")
-                            .withQualifier("0_key", "value")
-                            .build();
-                },
+                () -> PackageURLBuilder.aPackageURL()
+                        .withType("ype")
+                        .withName("name")
+                        .withQualifier("0_key", "value")
+                        .build(),
                 "Build should fail due to invalid qualifier key");
     }
 
@@ -164,13 +156,11 @@ void packageURLBuilderException5() {
     void packageURLBuilderException6() {
         assertThrowsExactly(
                 MalformedPackageURLException.class,
-                () -> {
-                    PackageURLBuilder.aPackageURL()
-                            .withType("ype")
-                            .withName("name")
-                            .withQualifier("", "value")
-                            .build();
-                },
+                () -> PackageURLBuilder.aPackageURL()
+                        .withType("ype")
+                        .withName("name")
+                        .withQualifier("", "value")
+                        .build(),
                 "Build should fail due to invalid qualifier key");
     }
 
diff --git a/src/test/java/com/github/packageurl/PackageURLTest.java b/src/test/java/com/github/packageurl/PackageURLTest.java
index 5577773..71d42ea 100644
--- a/src/test/java/com/github/packageurl/PackageURLTest.java
+++ b/src/test/java/com/github/packageurl/PackageURLTest.java
@@ -29,7 +29,6 @@
 
 import java.io.IOException;
 import java.util.Locale;
-import java.util.Map;
 import java.util.stream.Stream;
 import org.jspecify.annotations.Nullable;
 import org.junit.jupiter.api.AfterAll;
@@ -63,8 +62,7 @@ static void resetLocale() {
 
     @Test
     void validPercentEncoding() throws MalformedPackageURLException {
-        PackageURL purl =
-                new PackageURL("maven", "com.google.summit", "summit-ast", "2.2.0\n", (Map<String, String>) null, null);
+        PackageURL purl = new PackageURL("maven", "com.google.summit", "summit-ast", "2.2.0\n", null, null);
         assertEquals("pkg:maven/com.google.summit/summit-ast@2.2.0%0A", purl.toString());
         PackageURL purl2 =
                 new PackageURL("pkg:nuget/%D0%9Cicros%D0%BEft.%D0%95ntit%D1%83Fram%D0%B5work%D0%A1%D0%BEr%D0%B5");
@@ -74,7 +72,7 @@ void validPercentEncoding() throws MalformedPackageURLException {
     }
 
     @Test
-    void invalidPercentEncoding() throws MalformedPackageURLException {
+    void invalidPercentEncoding() {
         assertThrowsExactly(
                 MalformedPackageURLException.class,
                 () -> new PackageURL("pkg:maven/com.google.summit/summit-ast@2.2.0%"));
@@ -99,7 +97,10 @@ void constructorParsing(
             boolean invalid)
             throws Exception {
         if (invalid) {
-            assertThrows(getExpectedException(purlString), () -> new PackageURL(purlString));
+            assertThrows(
+                    getExpectedException(purlString),
+                    () -> new PackageURL(purlString),
+                    "Build should fail due to " + description);
         } else {
             PackageURL purl = new PackageURL(purlString);
             assertPurlEquals(parameters, purl);
@@ -131,7 +132,8 @@ void constructorParameters(
                             parameters.getName(),
                             parameters.getVersion(),
                             parameters.getQualifiers(),
-                            parameters.getSubpath()));
+                            parameters.getSubpath()),
+                    "Build should fail due to " + description);
         } else {
             PackageURL purl = new PackageURL(
                     parameters.getType(),
diff --git a/src/test/java/com/github/packageurl/internal/StringUtilTest.java b/src/test/java/com/github/packageurl/internal/StringUtilTest.java
index cd634f3..cbec577 100644
--- a/src/test/java/com/github/packageurl/internal/StringUtilTest.java
+++ b/src/test/java/com/github/packageurl/internal/StringUtilTest.java
@@ -24,14 +24,12 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrowsExactly;
 
-import com.github.packageurl.MalformedPackageURLException;
 import com.github.packageurl.ValidationException;
 import org.junit.jupiter.api.Test;
 
-public class StringUtilTest {
-
+class StringUtilTest {
     @Test
-    void invalidPercentEncoding() throws MalformedPackageURLException {
+    void invalidPercentEncoding() {
         Throwable t1 = assertThrowsExactly(ValidationException.class, () -> StringUtil.percentDecode("a%0"));
         assertEquals("Incomplete percent encoding at offset 1 with value '%0'", t1.getMessage());
         Throwable t2 = assertThrowsExactly(ValidationException.class, () -> StringUtil.percentDecode("aaaa%%0A"));