diff --git a/domain/src/test/java/org/oppia/android/domain/classify/rules/multiplechoiceinput/MultipleChoiceInputEqualsRuleClassifierProviderTest.kt b/domain/src/test/java/org/oppia/android/domain/classify/rules/multiplechoiceinput/MultipleChoiceInputEqualsRuleClassifierProviderTest.kt
index d16871e25dc..11b567c70ca 100644
--- a/domain/src/test/java/org/oppia/android/domain/classify/rules/multiplechoiceinput/MultipleChoiceInputEqualsRuleClassifierProviderTest.kt
+++ b/domain/src/test/java/org/oppia/android/domain/classify/rules/multiplechoiceinput/MultipleChoiceInputEqualsRuleClassifierProviderTest.kt
@@ -9,7 +9,7 @@ import dagger.Component
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
-import org.oppia.android.app.model.InteractionObject
+import org.oppia.android.domain.classify.InteractionObjectTestBuilder
 import org.robolectric.annotation.Config
 import org.robolectric.annotation.LooperMode
 import javax.inject.Inject
@@ -23,9 +23,12 @@ import kotlin.test.fail
 @LooperMode(LooperMode.Mode.PAUSED)
 @Config(manifest = Config.NONE)
 class MultipleChoiceInputEqualsRuleClassifierProviderTest {
-  private val NON_NEGATIVE_VALUE_0 = createNonNegativeInt(value = 0)
-  private val NON_NEGATIVE_VALUE_1 = createNonNegativeInt(value = 1)
-  private val STRING_VALUE_2 = createString(value = "test")
+
+  private val NON_NEGATIVE_VALUE_TEST_0 =
+    InteractionObjectTestBuilder.createNonNegativeInt(value = 0)
+  private val NON_NEGATIVE_VALUE_TEST_1 =
+    InteractionObjectTestBuilder.createNonNegativeInt(value = 1)
+  private val STRING_VALUE_TEST = InteractionObjectTestBuilder.createString(value = "test")
 
   @Inject
   internal lateinit var multipleChoiceInputEqualsRuleClassifierProvider:
@@ -42,10 +45,10 @@ class MultipleChoiceInputEqualsRuleClassifierProviderTest {
 
   @Test
   fun testNonNegativeAnswer_nonNegativeInput_sameValue_bothValuesMatch() {
-    val inputs = mapOf("x" to NON_NEGATIVE_VALUE_0)
+    val inputs = mapOf("x" to NON_NEGATIVE_VALUE_TEST_0)
 
     val matches = inputEqualsRuleClassifier.matches(
-      answer = NON_NEGATIVE_VALUE_0,
+      answer = NON_NEGATIVE_VALUE_TEST_0,
       inputs = inputs
     )
 
@@ -54,10 +57,10 @@ class MultipleChoiceInputEqualsRuleClassifierProviderTest {
 
   @Test
   fun testNonNegativeAnswer_nonNegativeInput_differentValue_bothValuesDoNotMatch() {
-    val inputs = mapOf("x" to NON_NEGATIVE_VALUE_0)
+    val inputs = mapOf("x" to NON_NEGATIVE_VALUE_TEST_0)
 
     val matches = inputEqualsRuleClassifier.matches(
-      answer = NON_NEGATIVE_VALUE_1,
+      answer = NON_NEGATIVE_VALUE_TEST_1,
       inputs = inputs
     )
 
@@ -66,11 +69,11 @@ class MultipleChoiceInputEqualsRuleClassifierProviderTest {
 
   @Test
   fun testNonNegativeAnswer_missingInput_throwsException() {
-    val inputs = mapOf("y" to NON_NEGATIVE_VALUE_0)
+    val inputs = mapOf("y" to NON_NEGATIVE_VALUE_TEST_0)
 
     val exception = assertThrows(IllegalStateException::class) {
       inputEqualsRuleClassifier.matches(
-        answer = NON_NEGATIVE_VALUE_0,
+        answer = NON_NEGATIVE_VALUE_TEST_0,
         inputs = inputs
       )
     }
@@ -82,11 +85,11 @@ class MultipleChoiceInputEqualsRuleClassifierProviderTest {
 
   @Test
   fun testUnexpectedStringAnswer_nonNegativeIntInput_throwsException() {
-    val inputs = mapOf("x" to NON_NEGATIVE_VALUE_0)
+    val inputs = mapOf("x" to NON_NEGATIVE_VALUE_TEST_0)
 
     val exception = assertThrows(IllegalStateException::class) {
       inputEqualsRuleClassifier.matches(
-        answer = STRING_VALUE_2,
+        answer = STRING_VALUE_TEST,
         inputs = inputs
       )
     }
@@ -98,11 +101,11 @@ class MultipleChoiceInputEqualsRuleClassifierProviderTest {
 
   @Test
   fun testNonNegativeAnswer_stringInput_throwsException() {
-    val inputs = mapOf("x" to STRING_VALUE_2)
+    val inputs = mapOf("x" to STRING_VALUE_TEST)
 
     val exception = assertThrows(IllegalStateException::class) {
       inputEqualsRuleClassifier.matches(
-        answer = NON_NEGATIVE_VALUE_0,
+        answer = NON_NEGATIVE_VALUE_TEST_0,
         inputs = inputs
       )
     }
@@ -112,14 +115,6 @@ class MultipleChoiceInputEqualsRuleClassifierProviderTest {
       .contains("Expected input value to be of type NON_NEGATIVE_INT")
   }
 
-  private fun createNonNegativeInt(value: Int): InteractionObject {
-    return InteractionObject.newBuilder().setNonNegativeInt(value).build()
-  }
-
-  private fun createString(value: String): InteractionObject {
-    return InteractionObject.newBuilder().setNormalizedString(value).build()
-  }
-
   private fun setUpTestApplicationComponent() {
     DaggerMultipleChoiceInputEqualsRuleClassifierProviderTest_TestApplicationComponent.builder()
       .setApplication(ApplicationProvider.getApplicationContext())