diff --git a/Source/cmCTest.cxx b/Source/cmCTest.cxx
index 390774f9c..b5e79a461 100644
--- a/Source/cmCTest.cxx
+++ b/Source/cmCTest.cxx
@@ -289,6 +289,10 @@ int cmCTest::Initialize(const char* binary_dir, bool new_tag,
     {
     this->BlockTestErrorDiagnostics();
     }
+  else
+    {
+    cmSystemTools::PutEnv("CTEST_INTERACTIVE_DEBUG_MODE=1");
+    }
 
   this->BinaryDir = binary_dir;
   cmSystemTools::ConvertToUnixSlashes(this->BinaryDir);
diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index f3b28bf54..aaa743fab 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -2554,7 +2554,8 @@ int cmake::ExecuteEchoColor(std::vector<std::string>& args)
   // likely no.
   int assumeTTY = cmsysTerminal_Color_AssumeTTY;
   if(cmSystemTools::GetEnv("DART_TEST_FROM_DART") ||
-     cmSystemTools::GetEnv("DASHBOARD_TEST_FROM_CTEST"))
+     cmSystemTools::GetEnv("DASHBOARD_TEST_FROM_CTEST") ||
+     cmSystemTools::GetEnv("CTEST_INTERACTIVE_DEBUG_MODE"))
     {
     // Avoid printing color escapes during dashboard builds.
     assumeTTY = 0;