diff --git a/kmath-nd4j/src/test/kotlin/space/kscience/kmath/nd4j/ArraysTest.kt b/kmath-nd4j/src/test/kotlin/space/kscience/kmath/nd4j/ArraysTest.kt
new file mode 100644
index 000000000..b1f258424
--- /dev/null
+++ b/kmath-nd4j/src/test/kotlin/space/kscience/kmath/nd4j/ArraysTest.kt
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2018-2021 KMath contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package space.kscience.kmath.nd4j
+
+import org.junit.jupiter.api.Test
+import kotlin.test.assertEquals
+
+class ArraysTest {
+    @Test
+    fun checkLinspaceBuilder() {
+        val array = LongArray(3).linspace(15, 22)
+        assertEquals(array[0],  15)
+        assertEquals(array[1], 18)
+        assertEquals(array[2], 21)
+    }
+
+    @Test
+    fun checkZerosBuilder() {
+        val array = LongArray(3).zeros()
+        assertEquals(array[0], 0)
+        assertEquals(array[1], 0)
+        assertEquals(array[2], 0)
+    }
+
+    @Test
+    fun checkOnesBuilder() {
+        val array = LongArray(3).ones()
+        assertEquals(array[0], 1)
+        assertEquals(array[1], 1)
+        assertEquals(array[2], 1)
+    }
+
+    @Test
+    fun checkRepeatBuilder() {
+        val array = repeat(5, 3)
+        assertEquals(array[0], 5)
+        assertEquals(array[1], 5)
+        assertEquals(array[2], 5)
+    }
+}
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