diff --git a/include/wx/cppunit.h b/include/wx/cppunit.h
index abf423e3f9..503ed3e8e0 100644
--- a/include/wx/cppunit.h
+++ b/include/wx/cppunit.h
@@ -116,17 +116,6 @@ assertEquals(int expected,
     assertEquals(size_t(expected), actual, sourceLine, message);
 }
 
-// and another, slightly different, for checking that result of potentially
-// different time_t type is the same as given time_t value
-inline void
-assertEquals(time_t expected,
-             long actual,
-             CppUnit::SourceLine sourceLine,
-             const std::string& message)
-{
-    assertEquals(expected, time_t(actual), sourceLine, message);
-}
-
 CPPUNIT_NS_END
 
 // Use this macro to compare a wxArrayString with the pipe-separated elements
diff --git a/tests/datetime/datetimetest.cpp b/tests/datetime/datetimetest.cpp
index 6add06a431..48611e4480 100644
--- a/tests/datetime/datetimetest.cpp
+++ b/tests/datetime/datetimetest.cpp
@@ -761,7 +761,7 @@ void DateTimeTestCase::TestTimeTicks()
 
         // GetValue() returns internal UTC-based representation, we need to
         // convert it to local TZ before comparing
-        long ticks = (dt.GetValue() / 1000).ToLong() + TZ_LOCAL.GetOffset();
+        time_t ticks = (dt.GetValue() / 1000).ToLong() + TZ_LOCAL.GetOffset();
         if ( dt.IsDST() )
             ticks += 3600;
         CPPUNIT_ASSERT_EQUAL( d.gmticks, ticks + tzOffset );