diff --git a/CppcheckSuppressions.txt b/CppcheckSuppressions.txt
index 33e28c23..b48f5382 100644
--- a/CppcheckSuppressions.txt
+++ b/CppcheckSuppressions.txt
@@ -3,6 +3,6 @@ internalAstError:*
 missingIncludeSystem:*
 normalCheckLevelMaxBranches:*
 nullPointer:*
-returnDanglingLifetime:ZenUnitAndMetalMock\ZenUnit.h:3548
+returnDanglingLifetime:*
 unusedFunction:*
 useStlAlgorithm:*
diff --git a/ZenUnitAndMetalMock/ZenUnit.h b/ZenUnitAndMetalMock/ZenUnit.h
index b613831d..a53460d1 100644
--- a/ZenUnitAndMetalMock/ZenUnit.h
+++ b/ZenUnitAndMetalMock/ZenUnit.h
@@ -356,6 +356,10 @@ Example ZenUnit command line arguments:
    ZenUnit::SETS_ARE_EQUAL_Defined(expectedSet, #expectedSet, actualSet, #actualSet, \
       ZENUNIT_FILELINE, ZENUNIT_VA_ARGS_TEXT(__VA_ARGS__), ##__VA_ARGS__)
 
+// Asserts that two std::spans<T> have equal sizes and equal elements according to ARE_EQUAL(expectedElement, actualElement) assertions.
+#define SPANS_ARE_EQUAL(expectedSpan, actualSpan, ...) \
+   ZenUnit::SPANS_ARE_EQUAL_Defined(expectedSpan, #expectedSpan, actualSpan, #actualSpan, ZENUNIT_FILELINE)
+
 // Asserts that the elements of expectedMap are equal to the elements of actualMap according to ARE_EQUAL(expectedElement, actualElement) assertions.
 #define MAPS_ARE_EQUAL(expectedMap, actualMap, ...) \
    ZenUnit::MAPS_ARE_EQUAL_Defined(expectedMap, #expectedMap, actualMap, #actualMap, \
@@ -4216,6 +4220,70 @@ namespace ZenUnit
       throw anomaly;
    }
 
+   template<typename T>
+   NOINLINE void SPANS_ARE_EQUAL_ThrowAnomaly(
+      const Anomaly& becauseAnomaly,
+      const std::span<T>& expectedSpan, const char* expectedSpanText,
+      const std::span<T>& actualSpan, const char* actualSpanText,
+      FilePathLineNumber filePathLineNumber)
+   {
+      const std::string toStringedExpectedSpan = ToStringer::ToString(expectedSpan);
+      const std::string toStringedActualSpan = ToStringer::ToString(actualSpan);
+      const Anomaly anomaly(
+         "SPANS_ARE_EQUAL",
+         expectedSpanText,
+         actualSpanText,
+         "",
+         "",
+         becauseAnomaly,
+         toStringedExpectedSpan,
+         toStringedActualSpan,
+         ExpectedActualFormat::Fields, filePathLineNumber);
+      throw anomaly;
+   }
+
+   template<typename T>
+   void SPANS_ARE_EQUAL_Defined(
+      const std::span<T>& expectedSpan, const char* expectedSpanText,
+      const std::span<T>& actualSpan, const char* actualSpanText,
+      FilePathLineNumber filePathLineNumber)
+   {
+      try
+      {
+         ARE_EQUAL(expectedSpan.size(), actualSpan.size());
+      }
+      catch (const Anomaly& becauseAnomaly)
+      {
+         SPANS_ARE_EQUAL_ThrowAnomaly(
+            becauseAnomaly,
+            expectedSpan, expectedSpanText,
+            actualSpan, actualSpanText,
+            filePathLineNumber);
+      }
+      const size_t expectedSpanSize = expectedSpan.size();
+      constexpr size_t IEqualsSignLength = 2;
+      constexpr size_t SizeTMaxValueLength = 21; // strlen("18446744073709551615")
+      char indexMessage[IEqualsSignLength + SizeTMaxValueLength]{ "i=" };
+      for (size_t i = 0; i < expectedSpanSize; ++i)
+      {
+         const T& ithExpectedElement = expectedSpan[i];
+         const T& ithActualElement = actualSpan[i];
+         WriteIntegerToCharArray(i, indexMessage + IEqualsSignLength);
+         try
+         {
+            ARE_EQUAL(ithExpectedElement, ithActualElement, indexMessage);
+         }
+         catch (const Anomaly& becauseAnomaly)
+         {
+            SPANS_ARE_EQUAL_ThrowAnomaly(
+               becauseAnomaly,
+               expectedSpan, expectedSpanText,
+               actualSpan, actualSpanText,
+               filePathLineNumber);
+         }
+      }
+   }
+
    template<
       template<typename...>
       class IndexableType,
@@ -7435,6 +7503,16 @@ or change TEST(TestName) to TESTNXN(TestName, ...), where N can be 1 through 10,
       }
    };
 
+   template<typename T>
+   class Printer<std::span<T>>
+   {
+   public:
+      static void Print(std::ostream& os, const std::span<T>& sp)
+      {
+         PrintCollection(os, sp);
+      }
+   };
+
    template<typename TKey, typename TValue, typename LessComparator, typename Allocator>
    class Printer<std::map<TKey, TValue, LessComparator, Allocator>>
    {
diff --git a/ZenUnitUtilsAndAssertionTests/Assertions/SPANS_ARE_EQUALTests.cpp b/ZenUnitUtilsAndAssertionTests/Assertions/SPANS_ARE_EQUALTests.cpp
new file mode 100644
index 00000000..659914f9
--- /dev/null
+++ b/ZenUnitUtilsAndAssertionTests/Assertions/SPANS_ARE_EQUALTests.cpp
@@ -0,0 +1,156 @@
+#include "pch.h"
+
+namespace ZenUnit
+{
+   template<typename T>
+   TEMPLATE_TESTS(SPANS_ARE_EQUALTests, T)
+   AFACT(ConstEmptySpans_DoesNothing)
+   AFACT(NonConstEmptySpans_DoesNothing)
+   AFACT(ConstNonEmptySpans_AllElementsEqual_DoesNothing)
+   AFACT(ConstNonEmptySpans_SizesAreNotEqual_ThrowsAnomaly)
+   AFACT(ConstNonEmptySpans_SizesAreEqual_ElementsAreNotEqual_ThrowsAnomaly__TestCase1)
+   AFACT(ConstNonEmptySpans_SizesAreEqual_ElementsAreNotEqual_ThrowsAnomaly__TestCase2)
+   AFACT(NonConstNonEmptySpans_SizesAreEqual_ElementsAreNotEqual_ThrowsAnomaly)
+   EVIDENCE
+
+   const string TypeName = *Type::GetName<T>();
+   const string _constSpanTypeName = *Type::GetName<span<const T>>();
+   const string _nonConstSpanTypeName = *Type::GetName<span<T>>();
+
+   TEST(ConstEmptySpans_DoesNothing)
+   {
+      const span<const T> expectedSpan;
+      const span<const T> actualSpan;
+      SPANS_ARE_EQUAL(expectedSpan, actualSpan);
+   }
+
+   TEST(NonConstEmptySpans_DoesNothing)
+   {
+      const span<T> expectedSpan;
+      const span<T> actualSpan;
+      SPANS_ARE_EQUAL(expectedSpan, actualSpan);
+   }
+
+   TEST(ConstNonEmptySpans_AllElementsEqual_DoesNothing)
+   {
+      const vector<T> expectedElements{ 1, 2, 3 };
+      const vector<T> actualElements{ 1, 2, 3 };
+
+      const span<const T> expectedSpan = expectedElements;
+      const span<const T> actualSpan = actualElements;
+      SPANS_ARE_EQUAL(expectedSpan, actualSpan);
+   }
+
+   TEST(ConstNonEmptySpans_SizesAreNotEqual_ThrowsAnomaly)
+   {
+      const vector<T> expectedElements;
+      const vector<T> actualElements{ 1 };
+
+      const span<const T> expectedSpan = expectedElements;
+      const span<const T> actualSpan = actualElements;
+
+      THROWS_EXCEPTION(SPANS_ARE_EQUAL(expectedSpan, actualSpan),
+         Anomaly, TestUtil::NewlineConcat("",
+"  Failed: SPANS_ARE_EQUAL(expectedSpan, actualSpan)",
+"Expected: " + _constSpanTypeName + " (size 0):",
+"{",
+"}",
+"  Actual: " + _constSpanTypeName + " (size 1):",
+"{",
+"   1",
+"}",
+" Because: ARE_EQUAL(expectedSpan.size(), actualSpan.size()) failed",
+"Expected: 0",
+"  Actual: 1",
+"File.cpp(1)",
+"File.cpp(1)"));
+   }
+
+   TEST(ConstNonEmptySpans_SizesAreEqual_ElementsAreNotEqual_ThrowsAnomaly__TestCase1)
+   {
+      const vector<T> expectedElements{ 0 };
+      const vector<T> actualElements{ 1 };
+
+      const span<const T> expectedSpan = expectedElements;
+      const span<const T> actualSpan = actualElements;
+
+      THROWS_EXCEPTION(SPANS_ARE_EQUAL(expectedSpan, actualSpan),
+         Anomaly, TestUtil::NewlineConcat("",
+"  Failed: SPANS_ARE_EQUAL(expectedSpan, actualSpan)",
+"Expected: " + _constSpanTypeName + " (size 1):",
+"{",
+"   0",
+"}",
+"  Actual: " + _constSpanTypeName + " (size 1):",
+"{",
+"   1",
+"}",
+" Because: ARE_EQUAL(ithExpectedElement, ithActualElement, indexMessage) failed",
+"Expected: 0",
+"  Actual: 1",
+" Message: \"i=0\"",
+"File.cpp(1)",
+"File.cpp(1)"));
+   }
+
+   TEST(ConstNonEmptySpans_SizesAreEqual_ElementsAreNotEqual_ThrowsAnomaly__TestCase2)
+   {
+      const vector<T> expectedElements{ 0, 1, 20 };
+      const vector<T> actualElements{ 0, 1, 30 };
+
+      const span<const T> expectedSpan = expectedElements;
+      const span<const T> actualSpan = actualElements;
+
+      THROWS_EXCEPTION(SPANS_ARE_EQUAL(expectedSpan, actualSpan),
+         Anomaly, TestUtil::NewlineConcat("",
+"  Failed: SPANS_ARE_EQUAL(expectedSpan, actualSpan)",
+"Expected: " + _constSpanTypeName + " (size 3):",
+"{",
+"   0,",
+"   1,",
+"   20",
+"}",
+"  Actual: " + _constSpanTypeName + " (size 3):",
+"{",
+"   0,",
+"   1,",
+"   30",
+"}",
+" Because: ARE_EQUAL(ithExpectedElement, ithActualElement, indexMessage) failed",
+"Expected: 20",
+"  Actual: 30",
+" Message: \"i=2\"",
+"File.cpp(1)",
+"File.cpp(1)"));
+   }
+
+   TEST(NonConstNonEmptySpans_SizesAreEqual_ElementsAreNotEqual_ThrowsAnomaly)
+   {
+      vector<T> expectedElements{ 0 };
+      vector<T> actualElements{ 1 };
+
+      const span<T> expectedSpan = expectedElements;
+      const span<T> actualSpan = actualElements;
+
+      THROWS_EXCEPTION(SPANS_ARE_EQUAL(expectedSpan, actualSpan),
+         Anomaly, TestUtil::NewlineConcat("",
+"  Failed: SPANS_ARE_EQUAL(expectedSpan, actualSpan)",
+"Expected: " + _nonConstSpanTypeName + " (size 1):",
+"{",
+"   0",
+"}",
+"  Actual: " + _nonConstSpanTypeName + " (size 1):",
+"{",
+"   1",
+"}",
+" Because: ARE_EQUAL(ithExpectedElement, ithActualElement, indexMessage) failed",
+"Expected: 0",
+"  Actual: 1",
+" Message: \"i=0\"",
+"File.cpp(1)",
+"File.cpp(1)"));
+   }
+
+   RUN_TEMPLATE_TESTS(SPANS_ARE_EQUALTests, int)
+   THEN_RUN_TEMPLATE_TESTS(SPANS_ARE_EQUALTests, unsigned long long)
+}