diff --git a/src/Compilers/Core/Portable/Compilation/Compilation.cs b/src/Compilers/Core/Portable/Compilation/Compilation.cs
index 98a6a4ba981c1..c8eb1c9461bb4 100644
--- a/src/Compilers/Core/Portable/Compilation/Compilation.cs
+++ b/src/Compilers/Core/Portable/Compilation/Compilation.cs
@@ -1169,7 +1169,9 @@ public INamedTypeSymbol CreateNativeIntegerTypeSymbol(bool signed)
             {
                 val = CommonGetTypeByMetadataName(fullyQualifiedMetadataName);
                 var result = _getTypeCache.TryAdd(fullyQualifiedMetadataName, val);
-                Debug.Assert(result || (_getTypeCache.TryGetValue(fullyQualifiedMetadataName, out var addedType) && ReferenceEquals(addedType, val)));
+                Debug.Assert(result
+                 || !_getTypeCache.TryGetValue(fullyQualifiedMetadataName, out var addedType) // Could fail if the type was already evicted from the cache
+                 || ReferenceEquals(addedType, val));
             }
             return val;
         }
@@ -1196,8 +1198,8 @@ public ImmutableArray<INamedTypeSymbol> GetTypesByMetadataName(string fullyQuali
                 val = getTypesByMetadataNameImpl();
                 var result = _getTypesCache.TryAdd(fullyQualifiedMetadataName, val);
                 Debug.Assert(result
-                    || (_getTypesCache.TryGetValue(fullyQualifiedMetadataName, out var addedArray)
-                        && Enumerable.SequenceEqual(addedArray, val, ReferenceEqualityComparer.Instance)));
+                    || !_getTypesCache.TryGetValue(fullyQualifiedMetadataName, out var addedArray) // Could fail if the type was already evicted from the cache
+                    || Enumerable.SequenceEqual(addedArray, val, ReferenceEqualityComparer.Instance));
             }
 
             return val;