diff --git a/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/UnsignedNumbersOnKeyTest.kt b/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/UnsignedNumbersOnKeyTest.kt
index 28b038d6..082eff77 100644
--- a/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/UnsignedNumbersOnKeyTest.kt
+++ b/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/UnsignedNumbersOnKeyTest.kt
@@ -4,6 +4,7 @@ import com.fasterxml.jackson.core.exc.InputCoercionException
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.fasterxml.jackson.module.kotlin.readValue
 import org.junit.jupiter.api.Assertions.assertThrows
+import org.junit.jupiter.api.Nested
 import org.junit.jupiter.api.Test
 import java.math.BigInteger
 import kotlin.test.assertEquals
@@ -13,7 +14,8 @@ internal class UnsignedNumbersOnKeyTest {
         val MAPPER = jacksonObjectMapper()
     }
 
-    class ForUByte {
+    @Nested
+    inner class ForUByte {
         private fun makeSrc(v: Int): String = MAPPER.writeValueAsString(mapOf(v to 0))
 
         @Test
@@ -37,7 +39,8 @@ internal class UnsignedNumbersOnKeyTest {
         }
     }
 
-    class ForUShort {
+    @Nested
+    inner class ForUShort {
         private fun makeSrc(v: Int): String = MAPPER.writeValueAsString(mapOf(v to 0))
 
         @Test
@@ -61,7 +64,8 @@ internal class UnsignedNumbersOnKeyTest {
         }
     }
 
-    class ForUInt {
+    @Nested
+    inner class ForUInt {
         private fun makeSrc(v: Long): String = MAPPER.writeValueAsString(mapOf(v to 0))
 
         @Test
@@ -85,7 +89,8 @@ internal class UnsignedNumbersOnKeyTest {
         }
     }
 
-    class ForULong {
+    @Nested
+    inner class ForULong {
         private fun makeSrc(v: BigInteger): String = MAPPER.writeValueAsString(mapOf(v to 0))
 
         @Test
diff --git a/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github101.kt b/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github101.kt
index de01e095..f7b4fcba 100644
--- a/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github101.kt
+++ b/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github101.kt
@@ -10,13 +10,15 @@ import kotlin.test.assertEquals
 class TestGithub101_JacksonInjectTest {
     @Test
     fun `JacksonInject-annotated parameters are populated when constructing Kotlin data classes`() {
-        val mapper = jacksonObjectMapper()
         val contextualValue = UUID.randomUUID()
-        assertEquals(SomeDatum("test", contextualValue),
-                mapper.readerFor(SomeDatum::class.java)
-                        .with(InjectableValues.Std(mapOf("context" to contextualValue)))
-                        .readValue("""{ "value": "test" }"""))
+        val reader = jacksonObjectMapper()
+            .readerFor(SomeDatum::class.java)
+            .with(InjectableValues.Std(mapOf("context" to contextualValue)))
+        assertEquals(
+            SomeDatum("test", contextualValue),
+            reader.readValue("""{ "value": "test" }""")
+        )
     }
 
     data class SomeDatum(val value: String, @JacksonInject("context") val contextualValue: UUID)
-}
\ No newline at end of file
+}
diff --git a/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github148.kt b/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github148.kt
index b4904fe8..b44504f8 100644
--- a/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github148.kt
+++ b/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github148.kt
@@ -1,6 +1,7 @@
 package com.fasterxml.jackson.module.kotlin.test.github
 
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import org.junit.jupiter.api.Nested
 import org.junit.jupiter.api.Test
 import kotlin.test.assertEquals
 
@@ -32,7 +33,8 @@ class TestGithub148 {
         val type: IncorrectType
     )
 
-    class DemoApplicationTests {
+    @Nested
+    inner class DemoApplicationTests {
         val objectMapper = jacksonObjectMapper()
 
         @Test
@@ -45,4 +47,4 @@ class TestGithub148 {
             assertEquals("{\"name\":\"incorrent\",\"type\":\"TYPEA\"}", objectMapper.writeValueAsString(IncorrentBean("incorrent", IncorrectType.TYPEA)))
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github168.kt b/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github168.kt
index 114bba16..29d31995 100644
--- a/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github168.kt
+++ b/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github168.kt
@@ -13,7 +13,7 @@ class TestGithub168 {
     class TestClass(@JsonProperty(value = "foo", required = true) foo: String?, val baz: String)
 
     @Test
-    fun testIfRequiredIsReallyRequiredWhenNullused() {
+    fun testIfRequiredIsReallyRequiredWhenNullUsed() {
         val obj = jacksonObjectMapper().readValue<TestClass>("""{"foo":null,"baz":"whatever"}""")
         assertEquals("whatever", obj.baz)
     }
@@ -27,7 +27,7 @@ class TestGithub168 {
     }
 
     @Test
-    fun testIfRequiredIsReallyRequiredWhenVauePresent() {
+    fun testIfRequiredIsReallyRequiredWhenValuePresent() {
         val obj = jacksonObjectMapper().readValue<TestClass>("""{"foo":"yay!","baz":"whatever"}""")
         assertEquals("whatever", obj.baz)
     }
diff --git a/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github722.kt b/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github722.kt
index 4ce93214..d7c51893 100644
--- a/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github722.kt
+++ b/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/Github722.kt
@@ -6,10 +6,8 @@ import com.fasterxml.jackson.annotation.JsonProperty
 import com.fasterxml.jackson.databind.InjectableValues
 import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
-import kotlin.math.exp
 import org.junit.jupiter.api.Test
 import kotlin.test.assertEquals
-import kotlin.test.assertNotEquals
 
 class Github722 {
     data class FailingDto @JsonCreator constructor(
@@ -39,11 +37,13 @@ class Github722 {
     @Test
     fun failing() {
         // The kotlin mapper uses the Kotlin default value instead of the Inject value.
-        val kotlinMapper = jacksonObjectMapper()
-        val result = kotlinMapper.readerFor(FailingDto::class.java)
+        val reader = jacksonObjectMapper()
+            .readerFor(FailingDto::class.java)
             .with(InjectableValues.Std(injectValues))
-            .readValue<FailingDto>("{}")
+        val result = reader.readValue<FailingDto>("{}")
 
+        // fixed
+        // assertNotEquals(result, expected, "GitHubXXX fixed.")
         assertEquals(expected, result)
     }
 
@@ -56,10 +56,10 @@ class Github722 {
 
     @Test
     fun withoutDefaultValue() {
-        val kotlinMapper = jacksonObjectMapper()
-        val result = kotlinMapper.readerFor(WithoutDefaultValue::class.java)
+        val reader = jacksonObjectMapper()
+            .readerFor(WithoutDefaultValue::class.java)
             .with(InjectableValues.Std(injectValues))
-            .readValue<WithoutDefaultValue>("{}")
+        val result = reader.readValue<WithoutDefaultValue>("{}")
 
         // If there is no default value, the problem does not occur.
         assertEquals(WithoutDefaultValue(1, 2), result)