diff --git a/simgear/misc/test_macros.hxx b/simgear/misc/test_macros.hxx
index ee4f5314..4e6e5a94 100644
--- a/simgear/misc/test_macros.hxx
+++ b/simgear/misc/test_macros.hxx
@@ -1,42 +1,43 @@
-
 #ifndef SG_MISC_TEST_MACROS_HXX
 #define SG_MISC_TEST_MACROS_HXX
 
+#include <iostream>
 #include <cmath>                // for std::fabs()
 
-#define SG_CHECK_EQUAL(a, b) \
-    if ((a) != (b))  { \
-        std::cerr << "failed:" << #a << " != " << #b << std::endl; \
-        std::cerr << "\tgot:'" << a << "'" << std::endl; \
-        std::cerr << "\tat:" << __FILE__ << ":" << __LINE__ << std::endl; \
-        exit(1); \
-    }
 
 #define SG_VERIFY(a) \
     if (!(a))  { \
-        std::cerr << "failed:" << #a << std::endl; \
-        std::cerr << "\tat:" << __FILE__ << ":" << __LINE__ << std::endl; \
+        std::cerr << "failed: " << #a << std::endl; \
+        std::cerr << "\tat " << __FILE__ << ":" << __LINE__ << std::endl; \
+        exit(1); \
+    }
+
+#define SG_CHECK_EQUAL(a, b) \
+    if ((a) != (b))  { \
+        std::cerr << "failed: " << #a << " != " << #b << std::endl; \
+        std::cerr << "\tgot '" << a << "' and '" << b << "'" << std::endl; \
+        std::cerr << "\tat " << __FILE__ << ":" << __LINE__ << std::endl; \
         exit(1); \
     }
 
 #define SG_CHECK_EQUAL_EP(a, b) \
     if (std::fabs((a) - (b)) > SG_EPSILON)  { \
-        std::cerr << "failed with epsilon:" << #a << " != " << #b << std::endl; \
-        std::cerr << "\tgot:'" << a << "'" << std::endl; \
-        std::cerr << "\tat:" << __FILE__ << ":" << __LINE__ << std::endl; \
+        std::cerr << "failed with epsilon: " << #a << " != " << #b << std::endl; \
+        std::cerr << "\tgot '" << a << "' and '" << b << "'" << std::endl; \
+        std::cerr << "\tat " << __FILE__ << ":" << __LINE__ << std::endl; \
         exit(1); \
     }
 
 #define SG_CHECK_EQUAL_EP2(a, b, ep) \
     if (std::fabs((a) - (b)) > ep)  { \
-        std::cerr << "failed with epsilon:" << #a << " != " << #b << std::endl; \
-        std::cerr << "\tgot:'" << a << "'" << std::endl; \
-        std::cerr << "\tat:" << __FILE__ << ":" << __LINE__ << std::endl; \
+        std::cerr << "failed with epsilon: " << #a << " != " << #b << std::endl; \
+        std::cerr << "\tgot '" << a << "' and '" << b << "'" << std::endl; \
+        std::cerr << "\tat " << __FILE__ << ":" << __LINE__ << std::endl; \
         exit(1); \
     }
 
 #define SG_TEST_FAIL(msg) \
-  std::cerr << "failure:" << msg; \
+  std::cerr << "failure: " << msg; \
   exit(1);