diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b626ce94..4388c31d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,7 +13,7 @@ jobs:
   sqlite:
     strategy:
       matrix:
-        go: ['1.14', '1.13']
+        go: ['1.15', '1.14', '1.13']
         platform: [ubuntu-latest, macos-latest] # can not run in windows OS
     runs-on: ${{ matrix.platform }}
 
@@ -38,7 +38,7 @@ jobs:
   sqlite_windows:
     strategy:
       matrix:
-        go: ['1.14', '1.13']
+        go: ['1.15', '1.14', '1.13']
         platform: [windows-latest]
     runs-on: ${{ matrix.platform }}
 
@@ -64,7 +64,7 @@ jobs:
     strategy:
       matrix:
         dbversion: ['mysql:latest', 'mysql:5.7', 'mysql:5.6', 'mariadb:latest']
-        go: ['1.14', '1.13']
+        go: ['1.15', '1.14', '1.13']
         platform: [ubuntu-latest]
     runs-on: ${{ matrix.platform }}
 
@@ -108,7 +108,7 @@ jobs:
     strategy:
       matrix:
         dbversion: ['postgres:latest', 'postgres:11', 'postgres:10']
-        go: ['1.14', '1.13']
+        go: ['1.15', '1.14', '1.13']
         platform: [ubuntu-latest] # can not run in macOS and widnowsOS
     runs-on: ${{ matrix.platform }}
 
@@ -150,7 +150,7 @@ jobs:
   sqlserver:
     strategy:
       matrix:
-        go: ['1.14', '1.13']
+        go: ['1.15', '1.14', '1.13']
         platform: [ubuntu-latest] # can not run test in macOS and windows
     runs-on: ${{ matrix.platform }}
 
diff --git a/tests/default_value_test.go b/tests/default_value_test.go
index ea496d60..aa4a511a 100644
--- a/tests/default_value_test.go
+++ b/tests/default_value_test.go
@@ -10,7 +10,7 @@ func TestDefaultValue(t *testing.T) {
 	type Harumph struct {
 		gorm.Model
 		Email   string `gorm:"not null;index:,unique"`
-		Name    string `gorm:"not null;default:'foo'"`
+		Name    string `gorm:"not null;default:foo"`
 		Name2   string `gorm:"size:233;not null;default:'foo'"`
 		Name3   string `gorm:"size:233;not null;default:''"`
 		Age     int    `gorm:"default:18"`