diff --git a/common/reactive/src/test/java/io/helidon/common/reactive/SingleTest.java b/common/reactive/src/test/java/io/helidon/common/reactive/SingleTest.java
index 4e17d7a9eb5..1cd3a05cce8 100644
--- a/common/reactive/src/test/java/io/helidon/common/reactive/SingleTest.java
+++ b/common/reactive/src/test/java/io/helidon/common/reactive/SingleTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2021 Oracle and/or its affiliates.
+ * Copyright (c) 2020, 2023 Oracle and/or its affiliates.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -262,11 +262,7 @@ public void testMap() {
 
     @Test
     public void testMapNullMapper() {
-        try {
-            Single.just("foo").map(null);
-            fail("NullPointerException should be thrown");
-        } catch (NullPointerException ex) {
-        }
+        assertThrows(NullPointerException.class, () -> Single.just("foo").map(null), "NullPointerException should be thrown");
     }
 
     @Test
@@ -375,11 +371,7 @@ public void testNeverFlatMap() {
 
     @Test
     public void testFlatMapNullMapper() {
-        try {
-            Single.just("bar").flatMap(null);
-            fail("NullPointerException should have been thrown");
-        } catch (NullPointerException ex) {
-        }
+        assertThrows(NullPointerException.class, () -> Single.just("bar").flatMap(null), "NullPointerException should have been thrown");
     }
 
     @Test
diff --git a/config/config-mp/src/test/java/io/helidon/config/mp/MpMetaConfigTest.java b/config/config-mp/src/test/java/io/helidon/config/mp/MpMetaConfigTest.java
index c55697e9fcd..5e82e86e9c4 100644
--- a/config/config-mp/src/test/java/io/helidon/config/mp/MpMetaConfigTest.java
+++ b/config/config-mp/src/test/java/io/helidon/config/mp/MpMetaConfigTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, 2022 Oracle and/or its affiliates.
+ * Copyright (c) 2021, 2023 Oracle and/or its affiliates.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,23 +16,18 @@
 
 package io.helidon.config.mp;
 
-import java.util.LinkedList;
-import java.util.List;
-
 import io.helidon.config.ConfigException;
 import org.eclipse.microprofile.config.Config;
 import org.eclipse.microprofile.config.ConfigProvider;
 import org.eclipse.microprofile.config.spi.ConfigProviderResolver;
-import org.eclipse.microprofile.config.spi.ConfigSource;
 import org.junit.jupiter.api.AfterAll;
-import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
-import static org.hamcrest.Matchers.iterableWithSize;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 
 class MpMetaConfigTest {
@@ -112,10 +107,7 @@ void testMetaPropertiesPathProfile() {
     void testMetaPropertiesNotOptional() {
         System.setProperty(MpMetaConfig.META_CONFIG_SYSTEM_PROPERTY,
                 "custom-mp-meta-config-not-optional.properties");
-        try {
-            config = ConfigProvider.getConfig();
-            Assertions.fail("Expecting meta-config to fail due to not optional non-existent config source");
-        } catch (ConfigException e) {}
+        assertThrows(ConfigException.class, ConfigProvider::getConfig, "Expecting meta-config to fail due to not optional non-existent config source");
     }
 
     @Test
diff --git a/config/hocon-mp/src/test/java/io/helidon/config/hocon/mp/HoconJsonMpMetaConfigTest.java b/config/hocon-mp/src/test/java/io/helidon/config/hocon/mp/HoconJsonMpMetaConfigTest.java
index b550e679551..ce45227201e 100644
--- a/config/hocon-mp/src/test/java/io/helidon/config/hocon/mp/HoconJsonMpMetaConfigTest.java
+++ b/config/hocon-mp/src/test/java/io/helidon/config/hocon/mp/HoconJsonMpMetaConfigTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Oracle and/or its affiliates.
+ * Copyright (c) 2022, 2023 Oracle and/or its affiliates.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,13 +22,13 @@
 import org.eclipse.microprofile.config.ConfigProvider;
 import org.eclipse.microprofile.config.spi.ConfigProviderResolver;
 import org.junit.jupiter.api.AfterAll;
-import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 class HoconJsonMpMetaConfigTest {
     private static ConfigProviderResolver configResolver;
@@ -150,9 +150,6 @@ void testMetaOrdinal() {
     @Test
     void testMetaHoconNonExistentNotOptional() {
         System.setProperty(META_CONFIG_SYSTEM_PROPERTY, "custom-mp-meta-config-hocon-path-not-optional.yaml");
-        try {
-            config = ConfigProvider.getConfig();
-            Assertions.fail("Expecting meta-config to fail due to not optional non-existent config source");
-        } catch (ConfigException e) {}
+        assertThrows(ConfigException.class, ConfigProvider::getConfig, "Expecting meta-config to fail due to not optional non-existent config source");
     }
 }
diff --git a/config/yaml-mp/src/test/java/io/helidon/config/yaml/mp/YamlMpMetaConfigTest.java b/config/yaml-mp/src/test/java/io/helidon/config/yaml/mp/YamlMpMetaConfigTest.java
index 97f887ab6da..d4de0228e55 100644
--- a/config/yaml-mp/src/test/java/io/helidon/config/yaml/mp/YamlMpMetaConfigTest.java
+++ b/config/yaml-mp/src/test/java/io/helidon/config/yaml/mp/YamlMpMetaConfigTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Oracle and/or its affiliates.
+ * Copyright (c) 2022, 2023 Oracle and/or its affiliates.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,7 +22,6 @@
 import org.eclipse.microprofile.config.spi.ConfigProviderResolver;
 import org.eclipse.microprofile.config.spi.ConfigSource;
 import org.junit.jupiter.api.AfterAll;
-import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
@@ -34,6 +33,7 @@
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 class YamlMpMetaConfigTest {
     private static ConfigProviderResolver configResolver;
@@ -126,9 +126,6 @@ void testMetaOrdinal() {
     @Test
     void testMetaNonExistentNotOptional() {
         System.setProperty(META_CONFIG_SYSTEM_PROPERTY, "custom-mp-meta-config-path-not-optional.yaml");
-        try {
-            config = ConfigProvider.getConfig();
-            Assertions.fail("Expecting meta-config to fail due to not optional non-existent config source");
-        } catch (ConfigException e) {}
+        assertThrows(ConfigException.class, ConfigProvider::getConfig, "Expecting meta-config to fail due to not optional non-existent config source");
     }
 }
diff --git a/security/jwt/src/test/java/io/helidon/security/jwt/SignedJwtTest.java b/security/jwt/src/test/java/io/helidon/security/jwt/SignedJwtTest.java
index 3e426f4c815..bfda0d73ed3 100644
--- a/security/jwt/src/test/java/io/helidon/security/jwt/SignedJwtTest.java
+++ b/security/jwt/src/test/java/io/helidon/security/jwt/SignedJwtTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2021 Oracle and/or its affiliates.
+ * Copyright (c) 2018, 2023 Oracle and/or its affiliates.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,7 +31,6 @@
 import static org.hamcrest.CoreMatchers.notNullValue;
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.jupiter.api.Assertions.assertThrows;
-import static org.junit.jupiter.api.Assertions.fail;
 
 /**
  * Unit test for {@link SignedJwt}.
@@ -94,12 +93,8 @@ public void testParsingInvalidEncodingOnTokenParts() {
                 {"payload", "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9+lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"},
                 {"signature", "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV/adQssw5c"}
         };
-        for (int i=0; i < tokens.length; i++) {
-            try {
-                SignedJwt.parseToken(tokens[i][1]);
-                fail("Parsing should have failed as the token " + tokens[i][0] + " is incorrectly encoded");
-            } catch (JwtException t) {
-            }
+        for (String[] token : tokens) {
+            assertThrows(JwtException.class, () -> SignedJwt.parseToken(token[1]), "Parsing should have failed as the token " + token[0] + " is incorrectly encoded");
         }
     }