diff --git a/druntime/src/core/internal/gc/impl/conservative/gc.d b/druntime/src/core/internal/gc/impl/conservative/gc.d
index 73fe087861a4..d156c0bd7485 100644
--- a/druntime/src/core/internal/gc/impl/conservative/gc.d
+++ b/druntime/src/core/internal/gc/impl/conservative/gc.d
@@ -4941,6 +4941,7 @@ unittest
 // improve predictability of coverage of code that is eventually not hit by other tests
 debug (SENTINEL) {} else // cannot extend with SENTINEL
 debug (MARK_PRINTF) {} else // takes forever
+version (OnlyLowMemUnittests) {} else
 unittest
 {
     import core.memory;
diff --git a/druntime/src/core/memory.d b/druntime/src/core/memory.d
index f2a48f9a3ae9..c00edad6a34e 100644
--- a/druntime/src/core/memory.d
+++ b/druntime/src/core/memory.d
@@ -575,6 +575,7 @@ extern(C):
 
     // https://issues.dlang.org/show_bug.cgi?id=13111
     ///
+    version (OnlyLowMemUnittests) {} else
     unittest
     {
         enum size1 = 1 << 11 + 1; // page in large object pool
diff --git a/druntime/src/rt/aaA.d b/druntime/src/rt/aaA.d
index 36f25554db35..5903d9cd754b 100644
--- a/druntime/src/rt/aaA.d
+++ b/druntime/src/rt/aaA.d
@@ -437,6 +437,7 @@ unittest
         string[412] names;
         ubyte[1024] moredata;
     }
+    version (OnlyLowMemUnittests) {} else
     test!(Large, Large);
 }
 
diff --git a/druntime/src/rt/lifetime.d b/druntime/src/rt/lifetime.d
index 8ce2d564bd63..4a071f3d81bb 100644
--- a/druntime/src/rt/lifetime.d
+++ b/druntime/src/rt/lifetime.d
@@ -2247,6 +2247,7 @@ unittest
         assert(GC.getAttr(p) == BlkAttr.NO_SCAN);
     }
     test(16);
+    version (OnlyLowMemUnittests) {} else
     test(1024 * 1024);
 }