diff --git a/openexr.changes b/openexr.changes
index 51e2cdc..00aee36 100644
--- a/openexr.changes
+++ b/openexr.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Sun Nov 24 13:47:08 UTC 2019 - Stefan Brüns <stefan.bruens@rwth-aachen.de>
+
+- Fix build with older cmake package (Leap 15.0 up to 15.2), the
+  included ctest macro does not accept extra parameters.
+
 -------------------------------------------------------------------
 Thu Nov 14 17:57:37 UTC 2019 - Christophe Giboudeaux <christophe@krop.fr>
 
diff --git a/openexr.spec b/openexr.spec
index 49757a0..1816c20 100644
--- a/openexr.spec
+++ b/openexr.spec
@@ -149,10 +149,15 @@ popd
 %check
 %ifarch x86_64
 pushd OpenEXR
-# tests takes LOONG, e. g. 20 min, in obs even more that
-# exceed timeout limit 25 min
 export LD_LIBRARY_PATH="$PWD/build/IlmImf:$PWD/build/IlmImfUtil:$LD_LIBRARY_PATH"
-%ctest --timeout 3000
+# tests can take longer than the default timeout of 25 minutes
+%if 0%{?suse_version} < 1550
+# HACK - older versions of the ctest macro do not allow passing additional parameters
+%global __ctest %{__ctest} --timeout 3600
+%ctest
+%else
+%ctest --timeout 3600
+%endif
 popd
 %endif