diff --git a/src/Illuminate/Validation/Concerns/ReplacesAttributes.php b/src/Illuminate/Validation/Concerns/ReplacesAttributes.php
index abd5ba154a5c..e995d0246d35 100644
--- a/src/Illuminate/Validation/Concerns/ReplacesAttributes.php
+++ b/src/Illuminate/Validation/Concerns/ReplacesAttributes.php
@@ -2,7 +2,6 @@
 
 namespace Illuminate\Validation\Concerns;
 
-use Illuminate\Support\Arr;
 use Illuminate\Support\Str;
 
 trait ReplacesAttributes
@@ -18,11 +17,17 @@ trait ReplacesAttributes
      */
     protected function replaceAcceptedIf($message, $attribute, $rule, $parameters)
     {
-        $parameters[1] = $this->getDisplayableValue($parameters[0], Arr::get($this->data, $parameters[0]));
+        $value = $this->getDisplayableValue($parameters[0], $parameters[1]);
 
         $parameters[0] = $this->getDisplayableAttribute($parameters[0]);
 
-        return $this->replaceWhileKeepingCase($message, ['other' => $parameters[0], 'value' => $parameters[1]]);
+        $message = $this->replaceWhileKeepingCase($message, ['other' => $parameters[0]]);
+
+        return str_replace(
+            [':value', ':VALUE', ':Value'],
+            [$value, Str::upper($value), Str::ucfirst($value)],
+            $message
+        );
     }
 
     /**
diff --git a/tests/Validation/ValidationConditionalRuleErrorMessagesTest.php b/tests/Validation/ValidationConditionalRuleErrorMessagesTest.php
new file mode 100644
index 000000000000..0afb1d830049
--- /dev/null
+++ b/tests/Validation/ValidationConditionalRuleErrorMessagesTest.php
@@ -0,0 +1,216 @@
+<?php
+
+namespace Illuminate\Tests\Validation;
+
+use Illuminate\Validation\Validator;
+
+class ValidationConditionalRuleErrorMessagesTest extends ValidationValidatorTest
+{
+    public function testRequiredIfShowsExpectedValueInMessage()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.required_if' => 'The :attribute field is required when :other is :value.'], 'en');
+
+        $v = new Validator($trans, ['status' => 'active'], ['reason' => 'required_if:status,inactive']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['status' => 'inactive'], ['reason' => 'required_if:status,inactive']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The reason field is required when status is inactive.', $v->messages()->first('reason'));
+    }
+
+    public function testRequiredIfWithBooleanShowsExpectedValue()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.required_if' => 'The :attribute field is required when :other is :value.'], 'en');
+
+        $v = new Validator($trans, ['is_active' => 'false'], ['reason' => 'required_if:is_active,true']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['is_active' => true], ['reason' => 'required_if:is_active,true']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The reason field is required when is active is true.', $v->messages()->first('reason'));
+
+        $v = new Validator($trans, ['is_active' => false], ['reason' => 'required_if:is_active,false']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The reason field is required when is active is false.', $v->messages()->first('reason'));
+    }
+
+    public function testRequiredIfWithCaseSensitivityShowsExpectedValue()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.required_if' => 'The :attribute field is required when :other is :value.'], 'en');
+
+        $v = new Validator($trans, ['field1' => 'AA', 'field2' => ''], ['field2' => 'required_if:field1,AA']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The field2 field is required when field1 is AA.', $v->messages()->first('field2'));
+
+        $v = new Validator($trans, ['field1' => 'Active', 'field2' => ''], ['field2' => 'required_if:field1,Active']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The field2 field is required when field1 is Active.', $v->messages()->first('field2'));
+    }
+
+    public function testRequiredIfWithNumericValues()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.required_if' => 'The :attribute field is required when :other is :value.'], 'en');
+
+        $v = new Validator($trans, ['count' => 0], ['description' => 'required_if:count,0']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The description field is required when count is 0.', $v->messages()->first('description'));
+
+        $v = new Validator($trans, ['count' => '5'], ['description' => 'required_if:count,10']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['count' => 10], ['description' => 'required_if:count,10']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The description field is required when count is 10.', $v->messages()->first('description'));
+    }
+
+    public function testProhibitedIfShowsExpectedValueInMessage()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.prohibited_if' => 'The :attribute field is prohibited when :other is :value.'], 'en');
+
+        $v = new Validator($trans, ['role' => 'admin', 'restricted_field' => 'value'], ['restricted_field' => 'prohibited_if:role,admin']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The restricted field field is prohibited when role is admin.', $v->messages()->first('restricted_field'));
+    }
+
+    public function testProhibitedIfWithBooleanShowsExpectedValue()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.prohibited_if' => 'The :attribute field is prohibited when :other is :value.'], 'en');
+
+        $v = new Validator($trans, ['is_public' => false, 'private_data' => 'secret'], ['private_data' => 'prohibited_if:is_public,false']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The private data field is prohibited when is public is false.', $v->messages()->first('private_data'));
+    }
+
+    public function testAcceptedIfShowsExpectedValueInMessage()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.accepted_if' => 'The :attribute field must be accepted when :other is :value.'], 'en');
+
+        $v = new Validator($trans, ['age' => '15', 'parental_consent' => 0], ['parental_consent' => 'accepted_if:age,15']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The parental consent field must be accepted when age is 15.', $v->messages()->first('parental_consent'));
+    }
+
+    public function testDeclinedIfShowsExpectedValueInMessage()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.declined_if' => 'The :attribute field must be declined when :other is :value.'], 'en');
+
+        $v = new Validator($trans, ['opt_in' => 'yes', 'marketing' => 1], ['marketing' => 'declined_if:opt_in,no']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['opt_in' => 'no', 'marketing' => 1], ['marketing' => 'declined_if:opt_in,no']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The marketing field must be declined when opt in is no.', $v->messages()->first('marketing'));
+    }
+
+    public function testMissingIfShowsExpectedValueInMessage()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.missing_if' => 'The :attribute field must be missing when :other is :value.'], 'en');
+
+        $v = new Validator($trans, ['type' => 'guest', 'member_id' => '123'], ['member_id' => 'missing_if:type,guest']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The member id field must be missing when type is guest.', $v->messages()->first('member_id'));
+    }
+
+    public function testPresentIfShowsExpectedValueInMessage()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.present_if' => 'The :attribute field must be present when :other is :value.'], 'en');
+
+        $v = new Validator($trans, ['payment_type' => 'card'], ['card_number' => 'present_if:payment_type,card']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The card number field must be present when payment type is card.', $v->messages()->first('card_number'));
+    }
+
+    public function testMultipleConditionalRulesShowCorrectMessages()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.required_if' => 'The :attribute field is required when :other is :value.'], 'en');
+
+        $v = new Validator($trans, [
+            'role' => 'admin',
+            'status' => 'inactive',
+        ], [
+            'reason' => 'required_if:status,inactive',
+            'admin_field' => 'required_if:role,admin',
+        ]);
+
+        $this->assertTrue($v->fails());
+        $messages = $v->messages();
+
+        $this->assertSame('The reason field is required when status is inactive.', $messages->first('reason'));
+        $this->assertSame('The admin field field is required when role is admin.', $messages->first('admin_field'));
+    }
+
+    public function testRequiredIfWithNullValue()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.required_if' => 'The :attribute field is required when :other is :value.'], 'en');
+
+        $v = new Validator($trans, ['field1' => null], ['field2' => 'required_if:field1,null']);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The field2 field is required when field1 is null.', $v->messages()->first('field2'));
+    }
+
+    public function testRequiredIfWithEmptyStringValue()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.required_if' => 'The :attribute field is required when :other is :value.'], 'en');
+
+        $v = new Validator($trans, ['field1' => ''], ['field2' => 'required_if:field1,']);
+        $this->assertTrue($v->fails());
+        $this->assertStringContainsString('when field1 is', $v->messages()->first('field2'));
+    }
+
+    public function testBooleanConversionBug()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.required_if' => 'The :attribute field is required when :other is :value.'], 'en');
+
+        $v = new Validator($trans, [
+            'field1' => 'false',
+        ], [
+            'field2' => 'required_if:field1,true',
+        ]);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, [
+            'field1' => 'true',
+        ], [
+            'field2' => 'required_if:field1,true',
+        ]);
+        $this->assertTrue($v->fails());
+        $this->assertSame('The field2 field is required when field1 is true.', $v->messages()->first('field2'));
+    }
+
+    public function testComplexScenarioWithMultipleFields()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->addLines(['validation.required_if' => 'The :attribute field is required when :other is :value.'], 'en');
+
+        $v = new Validator($trans, [
+            'subscription_type' => 'premium',
+            'payment_method' => 'card',
+            'is_active' => true,
+        ], [
+            'card_details' => 'required_if:payment_method,card',
+            'premium_features' => 'required_if:subscription_type,premium',
+            'activation_date' => 'required_if:is_active,true',
+        ]);
+
+        $this->assertTrue($v->fails());
+        $messages = $v->messages();
+
+        $this->assertSame('The card details field is required when payment method is card.', $messages->first('card_details'));
+        $this->assertSame('The premium features field is required when subscription type is premium.', $messages->first('premium_features'));
+        $this->assertSame('The activation date field is required when is active is true.', $messages->first('activation_date'));
+    }
+}
diff --git a/tests/Validation/ValidationValidatorTest.php b/tests/Validation/ValidationValidatorTest.php
index b6ec5ac6722f..23fb88e3d1ca 100755
--- a/tests/Validation/ValidationValidatorTest.php
+++ b/tests/Validation/ValidationValidatorTest.php
@@ -1815,7 +1815,7 @@ public function testRequiredIf()
         $trans->addLines(['validation.required_if' => 'The :attribute field is required when :other is :value.'], 'en');
         $v = new Validator($trans, ['first' => 'dayle', 'last' => ''], ['last' => 'RequiredIf:first,taylor,dayle']);
         $this->assertFalse($v->passes());
-        $this->assertSame('The last field is required when first is dayle.', $v->messages()->first('last'));
+        $this->assertSame('The last field is required when first is taylor.', $v->messages()->first('last'));
 
         $trans = $this->getIlluminateArrayTranslator();
         $trans->addLines(['validation.required_if' => 'The :attribute field is required when :other is :value.'], 'en');
@@ -1826,7 +1826,7 @@ public function testRequiredIf()
         ]);
         $this->assertTrue($v->fails());
         $this->assertCount(1, $v->messages());
-        $this->assertSame('The baz field is required when foo is 0.', $v->messages()->first('baz'));
+        $this->assertSame('The baz field is required when foo is false.', $v->messages()->first('baz'));
 
         $trans = $this->getIlluminateArrayTranslator();
         $v = new Validator($trans, [], [
@@ -1857,7 +1857,7 @@ public function testRequiredIf()
         ]);
         $this->assertTrue($v->fails());
         $this->assertCount(1, $v->messages());
-        $this->assertSame('The baz field is required when foo is empty.', $v->messages()->first('baz'));
+        $this->assertSame('The baz field is required when foo is null.', $v->messages()->first('baz'));
 
         $trans = $this->getIlluminateArrayTranslator();
         $v = new Validator(
@@ -2022,7 +2022,7 @@ public function testProhibitedIf()
         $trans->addLines(['validation.prohibited_if' => 'The :attribute field is prohibited when :other is :value.'], 'en');
         $v = new Validator($trans, ['first' => 'jess', 'last' => 'archer'], ['last' => 'prohibited_if:first,taylor,jess']);
         $this->assertFalse($v->passes());
-        $this->assertSame('The last field is prohibited when first is jess.', $v->messages()->first('last'));
+        $this->assertSame('The last field is prohibited when first is taylor.', $v->messages()->first('last'));
     }
 
     public function testValidateProhibitedAcceptedIf()
@@ -2756,7 +2756,7 @@ public function testValidateAcceptedIf()
         $v = new Validator($trans, ['foo' => 'no', 'bar' => 'abc'], ['foo' => 'accepted_if:bar,aaa,bbb,abc']);
         $this->assertFalse($v->passes());
         $v->messages()->setFormat(':message');
-        $this->assertSame('The foo field must be accepted when bar is abc.', $v->messages()->first('foo'));
+        $this->assertSame('The foo field must be accepted when bar is aaa.', $v->messages()->first('foo'));
 
         // accepted_if:bar,boolean
         $trans = $this->getIlluminateArrayTranslator();
@@ -3109,7 +3109,7 @@ public function testValidateDeclinedIf()
         $v = new Validator($trans, ['foo' => 'yes', 'bar' => 'abc'], ['foo' => 'declined_if:bar,aaa,bbb,abc']);
         $this->assertFalse($v->passes());
         $v->messages()->setFormat(':message');
-        $this->assertSame('The foo field must be declined when bar is abc.', $v->messages()->first('foo'));
+        $this->assertSame('The foo field must be declined when bar is aaa.', $v->messages()->first('foo'));
 
         // declined_if:bar,boolean
         $trans = $this->getIlluminateArrayTranslator();