diff --git a/exercises/hello-world/README.md b/exercises/hello-world/README.md
index 84cdfee6..3c67cc3e 100644
--- a/exercises/hello-world/README.md
+++ b/exercises/hello-world/README.md
@@ -23,10 +23,10 @@ Write your code in `src/hello_world.cljs`. It should use the namespace `hello-wo
 
 ### Running tests
 
-Run the tests using `clj A:test` command and make them pass:
+Run the tests using `clj -A:test` command and make them pass:
 
 ```
-$ clj A:test
+$ clj -A:test
 
 Testing hello-world-test
 
diff --git a/exercises/reverse-string/README.md b/exercises/reverse-string/README.md
index c3007723..219d7910 100644
--- a/exercises/reverse-string/README.md
+++ b/exercises/reverse-string/README.md
@@ -11,10 +11,10 @@ You can not use the `reverse` function, but you can use any of the other core fu
 
 ## Running tests
 
-Run the tests using `clj A:test` command and make them pass:
+Run the tests using `clj -A:test` command and make them pass:
 
 ```
-$ clj A:test
+$ clj -A:test
 
 Testing hello-world-test
 
diff --git a/exercises/two-fer/README.md b/exercises/two-fer/README.md
index 00a5ba19..9dc63748 100644
--- a/exercises/two-fer/README.md
+++ b/exercises/two-fer/README.md
@@ -27,10 +27,10 @@ Here are some examples:
 
 ### Running tests
 
-Run the tests using `clj A:test` command and make them pass:
+Run the tests using `clj -A:test` command and make them pass:
 
 ```
-$ clj A:test
+$ clj -A:test
 
 Testing hello-world-test