diff --git a/.changelog/unreleased/testing/247-e2e-fix-cmd-assert.md b/.changelog/unreleased/testing/247-e2e-fix-cmd-assert.md
new file mode 100644
index 0000000000..6696c5946a
--- /dev/null
+++ b/.changelog/unreleased/testing/247-e2e-fix-cmd-assert.md
@@ -0,0 +1,2 @@
+- E2E: Consume unread output before checking exit status.
+  ([#247](https://github.com/anoma/namada/pull/247))
diff --git a/tests/src/e2e/ledger_tests.rs b/tests/src/e2e/ledger_tests.rs
index f150e6eac0..a83d3f54ca 100644
--- a/tests/src/e2e/ledger_tests.rs
+++ b/tests/src/e2e/ledger_tests.rs
@@ -1566,7 +1566,7 @@ fn test_genesis_validators() -> Result<()> {
     let validator_0_alias = "validator-0";
     let validator_1_alias = "validator-1";
 
-    let init_genesis_validator_0 = setup::run_cmd(
+    let mut init_genesis_validator_0 = setup::run_cmd(
         Bin::Client,
         [
             "utils",
@@ -1602,7 +1602,7 @@ fn test_genesis_validators() -> Result<()> {
         .remove(validator_0_alias)
         .unwrap();
 
-    let init_genesis_validator_1 = setup::run_cmd(
+    let mut init_genesis_validator_1 = setup::run_cmd(
         Bin::Client,
         [
             "utils",
diff --git a/tests/src/e2e/setup.rs b/tests/src/e2e/setup.rs
index 2b0aba0696..28f1cf1825 100644
--- a/tests/src/e2e/setup.rs
+++ b/tests/src/e2e/setup.rs
@@ -503,14 +503,20 @@ impl AnomaCmd {
     }
 
     /// Assert that the process exited with success
-    pub fn assert_success(&self) {
+    pub fn assert_success(&mut self) {
+        // Make sure that there is no unread output first
+        let _ = self.exp_eof().unwrap();
+
         let status = self.session.wait().unwrap();
         assert_eq!(WaitStatus::Exited(self.session.pid(), 0), status);
     }
 
     /// Assert that the process exited with failure
     #[allow(dead_code)]
-    pub fn assert_failure(&self) {
+    pub fn assert_failure(&mut self) {
+        // Make sure that there is no unread output first
+        let _ = self.exp_eof().unwrap();
+
         let status = self.session.wait().unwrap();
         assert_ne!(WaitStatus::Exited(self.session.pid(), 0), status);
     }