diff --git a/mockito-kotlin/src/main/kotlin/org/mockito/kotlin/AdditionalMatchers.kt b/mockito-kotlin/src/main/kotlin/org/mockito/kotlin/AdditionalMatchers.kt
index 807ba08..1889b43 100644
--- a/mockito-kotlin/src/main/kotlin/org/mockito/kotlin/AdditionalMatchers.kt
+++ b/mockito-kotlin/src/main/kotlin/org/mockito/kotlin/AdditionalMatchers.kt
@@ -55,9 +55,9 @@ inline fun <reified T : Comparable<T>> cmpEq(value: T): T {
 
 /**
  * Any array argument that is equal to the given array, i.e. it has to have the same type, length,
- * and each element has to be equal. </T>
+ * and each element has to be equal.
  */
-fun <T> aryEq(value: Array<T>?): Array<T> {
+inline fun <reified T> aryEq(value: Array<T>): Array<T> {
   return AdditionalMatchers.aryEq(value) ?: createInstance()
 }
 
@@ -127,7 +127,7 @@ fun aryEq(value: BooleanArray): BooleanArray {
 
 /** String argument that contains a substring that matches the given regular expression. */
 fun find(regex: Regex): String {
-    return AdditionalMatchers.find(regex.pattern) ?: createInstance()
+    return AdditionalMatchers.find(regex.pattern) ?: ""
 }
 
 /** argument that matches both given argument matchers. */
@@ -150,7 +150,7 @@ inline fun <reified T : Any> not(matcher: T): T {
  * less than the given delta details.
  */
 fun eq(value: Double, delta: Double): Double {
-    return AdditionalMatchers.eq(value, delta)
+    return AdditionalMatchers.eq(value, delta) ?: 0.0
 }
 
 /**
@@ -158,5 +158,5 @@ fun eq(value: Double, delta: Double): Double {
  * is less than the given delta details.
  */
 fun eq(value: Float, delta: Float): Float {
-    return AdditionalMatchers.eq(value, delta)
+    return AdditionalMatchers.eq(value, delta) ?: 0.0f
 }
diff --git a/tests/src/test/kotlin/test/AdditionalMatchersTest.kt b/tests/src/test/kotlin/test/AdditionalMatchersTest.kt
index 2cf1197..4036f7c 100644
--- a/tests/src/test/kotlin/test/AdditionalMatchersTest.kt
+++ b/tests/src/test/kotlin/test/AdditionalMatchersTest.kt
@@ -3,7 +3,7 @@ package test
 import org.junit.Test
 import org.mockito.kotlin.*
 
-class ArgumentCaptorTest : TestBase() {
+class AdditionalCaptorsTest : TestBase() {
 
     @Test
     fun testGeq() {
@@ -44,11 +44,11 @@ class ArgumentCaptorTest : TestBase() {
     }
 
     @Test
-    fun testCmp() {
+    fun testCmpEq() {
         mock<Methods>().apply {
             int(1)
-            verify(this).int(cmp(1))
-            verify(this, never()).int(cmp(2))
+            verify(this).int(cmpEq(1))
+            verify(this, never()).int(cmpEq(2))
         }
     }
 
@@ -62,7 +62,7 @@ class ArgumentCaptorTest : TestBase() {
     }
 
     @Test
-    fun testAryEqPrimitive() {
+    fun testAryEq() {
         mock<Methods>().apply {
             stringArray(arrayOf("Hello", "there"))
             verify(this).stringArray(aryEq(arrayOf("Hello", "there")))
@@ -74,8 +74,8 @@ class ArgumentCaptorTest : TestBase() {
     fun testfind() {
         mock<Methods>().apply {
             string("Hello")
-            verify(this).string(find("l+o$".toRegex())
-            verify(this, never()).string(find("l$".toRegex())
+            verify(this).string(find("l+o$".toRegex()))
+            verify(this, never()).string(find("l$".toRegex()))
         }
     }
 
@@ -92,8 +92,8 @@ class ArgumentCaptorTest : TestBase() {
     fun testOr() {
         mock<Methods>().apply {
             int(5)
-            verify(this).int(and(lt(4), gt(4)))
-            verify(this, never()).int(and(lt(5), (5)))
+            verify(this).int(and(gt(4), lt(6)))
+            verify(this, never()).int(and(gt(4), lt(4)))
         }
     }