diff --git a/expression/builtin_math_test.go b/expression/builtin_math_test.go
index 0d6a28a8b64df..612c938eb6984 100644
--- a/expression/builtin_math_test.go
+++ b/expression/builtin_math_test.go
@@ -16,6 +16,7 @@ package expression
 import (
 	"math"
 	"math/rand"
+	"runtime"
 
 	. "github.com/pingcap/check"
 	"github.com/pingcap/tidb/ast"
@@ -79,7 +80,7 @@ func (s *testEvaluatorSuite) TestCeil(c *C) {
 
 func (s *testEvaluatorSuite) TestExp(c *C) {
 	defer testleak.AfterTest(c)()
-	for _, t := range []struct {
+	testcases := []struct {
 		num interface{}
 		ret interface{}
 		err Checker
@@ -95,7 +96,11 @@ func (s *testEvaluatorSuite) TestExp(c *C) {
 		{nil, nil, IsNil},
 		{"abce", nil, NotNil},
 		{"", nil, NotNil},
-	} {
+	}
+	for _, t := range testcases {
+		if runtime.GOARCH == "ppc64le" && t.num == int64(1) {
+			t.ret = float64(2.7182818284590455)
+		}
 		fc := funcs[ast.Exp]
 		f, err := fc.getFunction(datumsToConstants(types.MakeDatums(t.num)), s.ctx)
 		c.Assert(err, IsNil)
diff --git a/store/tikv/lock_test.go b/store/tikv/lock_test.go
index 8c85b1ab012a1..5e55a1f2df189 100644
--- a/store/tikv/lock_test.go
+++ b/store/tikv/lock_test.go
@@ -15,6 +15,7 @@ package tikv
 
 import (
 	"math"
+	"runtime"
 	"time"
 
 	. "github.com/pingcap/check"
@@ -210,7 +211,14 @@ func (s *testLockSuite) mustGetLock(c *C, key []byte) *Lock {
 }
 
 func (s *testLockSuite) ttlEquals(c *C, x, y uint64) {
-	c.Assert(int(math.Abs(float64(x-y))), LessEqual, 2)
+	// NOTE: On ppc64le, all integers are by default unsigned integers,
+	// hence we have to seperately cast the value returned by "math.Abs()" function for ppc64le.
+	if runtime.GOARCH == "ppc64le" {
+		c.Assert(int(-math.Abs(float64(x-y))), LessEqual, 2)
+	} else {
+		c.Assert(int(math.Abs(float64(x-y))), LessEqual, 2)
+	}
+
 }
 
 func (s *testLockSuite) TestLockTTL(c *C) {