diff --git a/cmd/gh-aw/main_entry_test.go b/cmd/gh-aw/main_entry_test.go
index 7d99c5d649c..99cd6964308 100644
--- a/cmd/gh-aw/main_entry_test.go
+++ b/cmd/gh-aw/main_entry_test.go
@@ -40,6 +40,11 @@ func TestValidateEngine(t *testing.T) {
 			engine:    "copilot",
 			expectErr: false,
 		},
+		{
+			name:      "valid copilot-sdk engine",
+			engine:    "copilot-sdk",
+			expectErr: false,
+		},
 		{
 			name:      "valid custom engine",
 			engine:    "custom",
@@ -89,7 +94,7 @@ func TestValidateEngine(t *testing.T) {
 
 				// Check that error message contains the expected format
 				// Error may include "Did you mean" suggestions, so we check if it starts with the base message
-				expectedMsg := fmt.Sprintf("invalid engine value '%s'. Must be 'claude', 'codex', 'copilot', or 'custom'", tt.engine)
+				expectedMsg := fmt.Sprintf("invalid engine value '%s'. Must be 'claude', 'codex', 'copilot', 'copilot-sdk', or 'custom'", tt.engine)
 				if tt.errMessage != "" && !strings.HasPrefix(err.Error(), expectedMsg) {
 					t.Errorf("validateEngine(%q) error message = %v, want to start with %v", tt.engine, err.Error(), expectedMsg)
 				}
diff --git a/pkg/workflow/imported_steps_validation_test.go b/pkg/workflow/imported_steps_validation_test.go
index 5721c28fa6b..c9ee754c0f6 100644
--- a/pkg/workflow/imported_steps_validation_test.go
+++ b/pkg/workflow/imported_steps_validation_test.go
@@ -60,10 +60,14 @@ This workflow imports a custom engine with agentic secrets.
 
 		require.Error(t, err, "Expected error in strict mode")
 		if err != nil {
-			assert.Contains(t, err.Error(), "strict mode", "Error should mention strict mode")
-			assert.Contains(t, err.Error(), "COPILOT_GITHUB_TOKEN", "Error should mention the secret name")
-			assert.Contains(t, err.Error(), "GitHub Copilot CLI", "Error should mention the engine")
-			assert.Contains(t, err.Error(), "custom engine steps", "Error should mention custom engine steps")
+			errMsg := err.Error()
+			assert.Contains(t, errMsg, "strict mode", "Error should mention strict mode")
+			assert.Contains(t, errMsg, "COPILOT_GITHUB_TOKEN", "Error should mention the secret name")
+			// Check for either Copilot CLI or Copilot SDK (both use COPILOT_GITHUB_TOKEN)
+			hasCopilotCLI := strings.Contains(errMsg, "GitHub Copilot CLI")
+			hasCopilotSDK := strings.Contains(errMsg, "GitHub Copilot SDK")
+			assert.True(t, hasCopilotCLI || hasCopilotSDK, "Error should mention the engine (GitHub Copilot CLI or GitHub Copilot SDK)")
+			assert.Contains(t, errMsg, "custom engine steps", "Error should mention custom engine steps")
 		}
 	})
 
@@ -329,10 +333,11 @@ imports:
 		// Should mention both secrets
 		assert.Contains(t, errMsg, "COPILOT_GITHUB_TOKEN")
 		assert.Contains(t, errMsg, "ANTHROPIC_API_KEY")
-		// Should mention the engines (GitHub Copilot CLI and/or Claude Code)
-		hasCopilot := strings.Contains(errMsg, "GitHub Copilot CLI")
+		// Should mention the engines (GitHub Copilot CLI/SDK and/or Claude Code)
+		hasCopilotCLI := strings.Contains(errMsg, "GitHub Copilot CLI")
+		hasCopilotSDK := strings.Contains(errMsg, "GitHub Copilot SDK")
 		hasClaude := strings.Contains(errMsg, "Claude Code")
-		assert.True(t, hasCopilot || hasClaude, "Should mention the engines")
+		assert.True(t, hasCopilotCLI || hasCopilotSDK || hasClaude, "Should mention the engines")
 	}
 }