Modified incorrect character (#335)

diff --git a/README.md b/README.md
index b55dc53..cffaa7b 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@
 
 Integration test leverages [docker](https://docs.docker.com/get-started/) to setup test environment, more accurately, to start dubbo provider instance, and any other supporting systems like registry center if necessary, in docker. 
 
-Please install `docker` and `docker-compose` first, then build the test image `dubb/sample-test`.
+Please install `docker` and `docker-compose` first, then build the test image `dubbo/sample-test`.
 
 ```bash
 cd dubbo-samples
@@ -52,9 +52,9 @@
   cd dubbo-samples
   ./test/run-tests.sh <project.basedir>
   ```
-    
+  
   For example, run the `dubbo-samples-annotation` test case:
-    
+  
   ```
   ./test/run-tests.sh dubbo-samples-annotation
   ```