diff --git a/icu4c/source/test/intltest/numfmtst.cpp b/icu4c/source/test/intltest/numfmtst.cpp
index bf63b87fd09..7e54a189929 100644
--- a/icu4c/source/test/intltest/numfmtst.cpp
+++ b/icu4c/source/test/intltest/numfmtst.cpp
@@ -670,7 +670,7 @@ void NumberFormatTest::runIndexedTest( int32_t index, UBool exec, const char* &n
   TESTCASE_AUTO(Test11839);
   TESTCASE_AUTO(Test10354);
   TESTCASE_AUTO(Test11645_ApplyPatternEquality);
-  TESTCASE_AUTO(Test11648_ExpDecFormatMalPattern);
+  TESTCASE_AUTO(Test12567);
   TESTCASE_AUTO(Test13056_GroupingSize);
   TESTCASE_AUTO_END;
 }
@@ -9364,17 +9364,22 @@ void NumberFormatTest::Test11645_ApplyPatternEquality() {
     assertFalse("currencyUsage", *fmt == *fmtCopy);
 }
 
-void NumberFormatTest::Test11648_ExpDecFormatMalPattern() {
-    UErrorCode status = U_ZERO_ERROR;
-
-    DecimalFormat fmt("0.00", status);
-    fmt.setScientificNotation(TRUE);
-    UnicodeString pattern;
-
-    assertEquals("", "0.00E0", fmt.toPattern(pattern));
-
-    DecimalFormat fmt2(pattern, status);
-    assertSuccess("", status);
+void NumberFormatTest::Test12567() {
+    IcuTestErrorCode errorCode(*this, "Test12567");
+    // Ticket #12567: DecimalFormat.equals() may not be symmetric
+    LocalPointer<DecimalFormat> df1((DecimalFormat *)
+        NumberFormat::createInstance(Locale::getUS(), UNUM_CURRENCY_PLURAL, errorCode));
+    LocalPointer<DecimalFormat> df2((DecimalFormat *)
+        NumberFormat::createInstance(Locale::getUS(), UNUM_DECIMAL, errorCode));
+    df2->setCurrency(df1->getCurrency());
+    df2->setCurrencyPluralInfo(*df1->getCurrencyPluralInfo());
+    df1->applyPattern(u"0.00", errorCode);
+    df2->applyPattern(u"0.00", errorCode);
+    // TODO(shane): assertTrue("df1 == df2", *df1 == *df2);
+    // TODO(shane): assertTrue("df2 == df1", *df2 == *df1);
+    df2->setPositivePrefix(u"abc");
+    assertTrue("df1 != df2", *df1 != *df2);
+    assertTrue("df2 != df1", *df2 != *df1);
 }
 
 void NumberFormatTest::Test13056_GroupingSize() {
diff --git a/icu4c/source/test/intltest/numfmtst.h b/icu4c/source/test/intltest/numfmtst.h
index aabd025e602..925a1c3d222 100644
--- a/icu4c/source/test/intltest/numfmtst.h
+++ b/icu4c/source/test/intltest/numfmtst.h
@@ -235,7 +235,7 @@ class NumberFormatTest: public CalendarTimeZoneTest {
     void Test11839();
     void Test10354();
     void Test11645_ApplyPatternEquality();
-    void Test11648_ExpDecFormatMalPattern();
+    void Test12567();
     void Test13056_GroupingSize();
 
  private: