diff --git a/tests/FIRST_SIM.DATA b/tests/FIRST_SIM.DATA
index 769c9e439..747fb729a 100644
--- a/tests/FIRST_SIM.DATA
+++ b/tests/FIRST_SIM.DATA
@@ -9,6 +9,15 @@ UNIFIN
 DIMENS
  10 10 10 /
 
+WELLDIMS
+-- Item 1: NWMAX  (Maximum number of wells in model)
+-- Item 2: NCWMAX (Maximum number of connections per well)
+-- Item 3: NGMAX  (Maximum number of groups in model--excluding FIELD)
+-- Item 4: NWGMAX (Maximum number of wells or child groups per group)
+-- NWMAX  NCWMAX  NGMAX  NWGMAX
+   6      3       1      6
+/
+
 GRID
 DXV
 10*0.25 /
diff --git a/tests/SUMMARY_EFF_FAC.DATA b/tests/SUMMARY_EFF_FAC.DATA
index 9e8c344a1..7be51b345 100644
--- a/tests/SUMMARY_EFF_FAC.DATA
+++ b/tests/SUMMARY_EFF_FAC.DATA
@@ -12,6 +12,15 @@ DIMENS
 REGDIMS
   10 /
 
+WELLDIMS
+-- Item 1: NWMAX  (Maximum number of wells in model)
+-- Item 2: NCWMAX (Maximum number of connections per well)
+-- Item 3: NGMAX  (Maximum number of groups in model--excluding FIELD)
+-- Item 4: NWGMAX (Maximum number of wells or child groups per group)
+-- NWMAX  NCWMAX  NGMAX  NWGMAX
+   3      2       5      2
+/
+
 OIL
 GAS
 WATER
diff --git a/tests/summary_deck.DATA b/tests/summary_deck.DATA
index 9b1879786..6b7558190 100644
--- a/tests/summary_deck.DATA
+++ b/tests/summary_deck.DATA
@@ -17,6 +17,15 @@ DIMENS
 REGDIMS
   10 /
 
+WELLDIMS
+-- Item 1: NWMAX  (Maximum number of wells in model)
+-- Item 2: NCWMAX (Maximum number of connections per well)
+-- Item 3: NGMAX  (Maximum number of groups in model--excluding FIELD)
+-- Item 4: NWGMAX (Maximum number of wells or child groups per group)
+-- NWMAX  NCWMAX  NGMAX  NWGMAX
+   5      2       3      2
+/
+
 OIL
 GAS
 WATER
diff --git a/tests/summary_deck_non_constant_porosity.DATA b/tests/summary_deck_non_constant_porosity.DATA
index 5f1dd764a..6eb61571a 100644
--- a/tests/summary_deck_non_constant_porosity.DATA
+++ b/tests/summary_deck_non_constant_porosity.DATA
@@ -21,6 +21,15 @@ OIL
 GAS
 WATER
 
+WELLDIMS
+-- Item 1: NWMAX  (Maximum number of wells in model)
+-- Item 2: NCWMAX (Maximum number of connections per well)
+-- Item 3: NGMAX  (Maximum number of groups in model--excluding FIELD)
+-- Item 4: NWGMAX (Maximum number of wells or child groups per group)
+-- NWMAX  NCWMAX  NGMAX  NWGMAX
+   4      2       3      2
+/
+
 GRID
 
 DX
diff --git a/tests/testblackoilstate3.DATA b/tests/testblackoilstate3.DATA
index 404d5ca9e..84a53fa85 100644
--- a/tests/testblackoilstate3.DATA
+++ b/tests/testblackoilstate3.DATA
@@ -17,6 +17,15 @@ METRIC
 DIMENS
     10  10   10   /
 
+WELLDIMS
+-- Item 1: NWMAX  (Maximum number of wells in model)
+-- Item 2: NCWMAX (Maximum number of connections per well)
+-- Item 3: NGMAX  (Maximum number of groups in model--excluding FIELD)
+-- Item 4: NWGMAX (Maximum number of wells or child groups per group)
+-- NWMAX  NCWMAX  NGMAX  NWGMAX
+   9      10      2      6
+/
+
 GRID
 DXV 
 10*10 /